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A polycatenated nickel(II) coordination polymer as a luminescence sensor for nitrofurantoin in aqueous medium Z. Naturforschung B (IF 0.8) Pub Date : 2024-03-15 Liang Zhang, Weiwei Cheng
A Ni(II) complex, [Ni2(FDC)2(4,4′-BMIBP)2(H2O)2·3H2O] n (1) (4,4′-BMIBP = 4,4’-bis(2-methyl-imidazolyl)biphenyl, H2FDC = 2,5-furandicarboxylic acid) was hydrothermally synthesized and structurally characterized. Complex 1 possesses a polycatenated architecture based on an undulated (4,4)-sql layer. Complex 1 can be used for the selective detection of nitrofurantoin (NFT) in aqueous solutions. The luminescence
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Synthesis and structure of a manganese(II) coordination polymer assembled with 5-(tert-butyl)isophthalic acid and 1,3-dimethyl-2-imidazolidinone Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-28 Xin-hong Chang
A manganese(II) coordination polymer [Mn(tbip)(DMI)] n (1), (tbipH2 = 5-(tert-butyl)isophthalic acid, DMI = 1,3-dimethyl-2-imidazolidinone), has been synthesized under “urea-thermal conditions” (i.e. in an excess of urea). Its structure has been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis and IR spectra. Complex 1 crystallizes in the monoclinic
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Diguanidinium hexafluoridogermanate(IV) – an organic–inorganic hybrid salt with an antifluorite topology Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-26 Jutta Kösters, David Böhnisch, Thomas Jüstel, Rainer Pöttgen
Polycrystalline diguanidinium hexafluoridogermanate (IV) was obtained by co-precipitation from solutions of diguanidinium carbonate and germanium dioxide in 48 % hydrogen fluoride. The [C(NH2)3]2[GeF6] structure was refined from single crystal X-ray diffractometer data: [C(NH2)3]2[TiF6] type, C2/m, a = 1276.67(8), b = 732.70(5), c = 616.37(5) pm, b = 114.497(5)°, wR = 0.0700, 1033 F 2 values, 53 variables
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DyIrSn and the Lu3Co2In4-type stannides Sm3Rh2Sn4 and RE 3Ir2Sn4 (RE = Y, Sm, Gd–Tm, Lu) Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-23 Lars Schumacher, Aylin Koldemir, Rainer Pöttgen
The Lu3Co2In4-type stannides RE 3Ir2Sn4 (RE = Y, Sm, Gd–Tm, Lu) were synthesized from the elements by arc-melting and subsequent annealing sequences in sealed silica ampoules. For a more comprehensive phase analytical study, the isotypic stannide Sm3Rh2Sn4 and the ZrNiAl-type stannides DyIrSn and LT-YIrSn were also obtained. The polycrystalline samples were characterized through their X-ray powder
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Synthesis and characterization of bis[(dimethylphosphanylethynyl)dimethylsilyl]methane-digold(I) dichloride Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-22 Peter Heinrichs, Hans-Georg Stammler, Norbert W. Mitzel
The reaction of chlorodimethylphosphane with dilithiated bis(ethynyldimethylsilyl)methane leads to the corresponding bis[(dimethylphosphanylethynyl)dimethylsilyl]methane (1) which reacts readily with chloroauric acid in the presence of a reductant to form its dinuclear chlorogold(I) complex (2). The terminal chloride units of this compound can be substituted by reaction with nucleophiles. Furthermore
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Isopointal intermetallics: the cP24, dca phases as a representative set of examples, along with their vacancy-ordered variants β-Mn and SrSi2 Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-22 Oliver Janka, Rainer Pöttgen
The crystal-chemical relationship of the cubic Laves phase MgCu2 (space group F d 3 ‾ $d\bar{3}$ m, cF24) with the ternary phases Cd2Cu3In, Na2Au3Al, Mg2Rh3P, Li2Pd3B, Ag2Pd3S, Cu3Pt2B, Mo3Al2C, Mo3Ni2N, and V3Ga2N (subgroup P4132, cP24, dca) is discussed based on a group-subgroup scheme. The course of the lattice parameters and the free positional parameters show substantially different distortions
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Synthesis, crystal structure, DFT calculations, and Hirshfeld surface analysis of a chlorido-bridged 1D manganese(II) coordination polymer Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-19 Chao Feng, Linlin Zhu, Jing-Jing Guo
A novel 1D Mn(II) coordination polymer, namely, [Mn3(bpz)2(MeCN)2Cl6] n (1) was synthesized by a solvothermal method based on bpz and MnCl2, where bpz is di(1H-pyrazol-1-yl)methane. The X-ray diffraction data show that the crystal structure of complex 1 is a one-dimensional polymer with two different coordination modes of the Mn(II) ions. The structure was modelled with Density Functional Theory (DFT)
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A plant cyclic nonapeptide of orbitide type: an electron density study Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-15 Peter Luger, Birger Dittrich, Heinz-Jürgen Schmidt
The electron density distribution (EDD) of a plant cyclic nonapeptide of orbitide type was studied. Crystal X-ray diffraction data was obtained from the Cambridge Structural Database (CSD) and refitted using scattering factors of the invariom library, thereby providing aspherical electron density. Bond topological, atomic properties and molecular surfaces (electrostatic potential and Hirshfeld surfaces)
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The crystal structures and magnetic properties of YbMg0.75In1.25 and Yb6Mg6.41In5.59 Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-14 Maximilian Kai Reimann, Rainer Pöttgen
The quasi-binary system YbMg2-YbIn2 was studied around the equiatomic composition. In contrast to the ordered rare earth (RE) phases REMgIn (ZrNiAl type), ytterbium forms phases with different structures and pronounced Mg/In mixing (M sites). The structures of YbMg0.75In1.25 (CaLiSn type, P3m1, a = 501.95(7), c = 1087.3(2) pm, wR2 = 0.0490, 790 F 2 values, 32 variables) and Yb6Mg6.41In5.59 (Yb6Ir5Ga7
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Synthesis, anti-HIV and cytotoxicity evaluation of chiral 2,5-disubstituted 1,3,4-thiadiazole derivatives bearing the sulfonamide scaffold Z. Naturforschung B (IF 0.8) Pub Date : 2024-02-13 Anum Israr, Shahid Hameed, Najim A. Al-Masoudi
In the present study, chiral 2-(4-substiuted phenyl)amino-5-[1-(4-substituted benzenesulphonamido)alkyl]-1,3,4-thiazdiazoles 5a–x were synthesized from enantiopure l-amino acids in a multistep sequence. The starting acids were reacted with arylsulphonyl chlorides to produce N-arylsulfonyl amino acids 1a–h, followed by esterification to obtain the corresponding esters 2a–h. Treatment of esters with
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Modifying the valence phase transition in Eu2Al15Pt6 by the solid solutions Eu2Al15(Pt1−x T x )6 (T = Pd, Ir, Au; x = 1/6) Z. Naturforschung B (IF 0.8) Pub Date : 2024-01-12 Stefan Engel, Lars Schumacher, Oliver Janka
The solid solutions Eu2Al15(Pt1−x T x )6 with T = Pd, Ir, Au and x = 1/6 were prepared by arc-melting the stoichiometric mixture of the elements, and subsequent annealing. For x = 1/6, all three solid solutions adopt the same structure type as Eu2Al15Pt6 according to powder X-ray diffraction data. Since the platinide Eu2Al15Pt6 exhibits a (3 + 1)D modulated structure (approximant in space group P121/m1)
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A solid-state 171Yb NMR-spectroscopic characterization of selected divalent ytterbium intermetallics Z. Naturforschung B (IF 0.8) Pub Date : 2024-01-12 Josef Maximilian Gerdes, Lars Schumacher, Michael Ryan Hansen, Rainer Pöttgen
The intermetallic ytterbium compounds YbZnSn, YbPdSn2, YbAuIn2 and their calcium-substituted counterparts Yb0.5Ca0.5ZnSn, Yb0.5Ca0.5PdSn2 and Yb0.5Ca0.5AuIn2 were synthesized by reaction of the elements in sealed tantalum tubes in an induction furnace. The samples were characterized by X-ray powder diffraction. Their static, temperature-dependent solid-state 171Yb NMR spectra exhibit strong positive
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The germanides ScTGe2 (T = Fe, Co, Ru, Rh) – crystal chemistry, 45Sc solid-state NMR and 57Fe Mössbauer spectroscopy Z. Naturforschung B (IF 0.8) Pub Date : 2024-01-12 Thomas Harmening, Samir F. Matar, Constanze Fehse, Steffen Klenner, Hellmut Eckert, Jutta Kösters, Wilma Pröbsting, Stefan Seidel, Rainer Pöttgen
The TiMnSi2-type (space group Pbam) germanides ScTGe2 (T = Fe, Co, Ru, Rh) were synthesized from the elements by arc-melting. Single crystals were grown by annealing sequences of the arc-melted buttons in an induction furnace. The structures of ScFeGe2, ScRuGe2 and ScRhGe2 were refined from single-crystal X-ray diffraction data. In ScRuGe2, the ruthenium atoms have distorted octahedral germanium coordination
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[Me3N(C6H3(CF3)2)][BF4] and [Me3N(C6H3(CH3)2)][BF4], as potential synthons for non-covalent supramolecular assembly Z. Naturforschung B (IF 0.8) Pub Date : 2024-01-12 Jonas R. Schmid, Anja Wiesner, Patrick Voßnacker, Martin Jansen, Sebastian Riedel
The compounds [Me3N(C6H3(CF3)2)][BF4] and [Me3N(C6H3(CH3)2)][BF4] were synthesized from commercially available starting materials and fully characterized by single-crystal X-ray diffraction, NMR, IR and Raman spectroscopy, as well as mass spectrometry. Both ammonium cations show potential for applications in crystal engineering due to their structure directing properties in the solid state.
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Expansion and adaptation of the M 5B12O25(OH) structure type to incorporate di- and trivalent transition metal cations Z. Naturforschung B (IF 0.8) Pub Date : 2024-01-12 Leonard C. Pasqualini, Martina Tribus, Hubert Huppertz
Five transition metal borates were synthesized in a Walker-type module under high-pressure/high-temperature conditions of 8–9 GPa and 800–1200 °C. They all exhibit the same interpenetrating, anionic borate network B12O26 16−, crystallizing in the space group I41/acd, and therefore show high similarities to the borates Ti5B12O26 and Ga5B12O25(OH). Cr5B12O25(OH) and V5B12O25(OH) are isotypic to Ga5B12O25(OH)
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Die Serie caesiumhaltiger Thioarsenate(V) der Lanthanoide vom Formeltyp Cs3 Ln[AsS4]2 mit Ln = La–Nd und Sm Z. Naturforschung B (IF 0.8) Pub Date : 2024-01-12 Katja Engel, Thomas Schleid
Cesium-containing thioarsenates(V) of lanthanoids with the composition Cs3 Ln[AsS4]2 can be prepared for Ln = La–Nd and Sm by the oxidation of the lanthanoid metals in the presence of orpiment (As2S3), cesium sesquisulfide (Cs2S3) and elemental sulfur (S). The reaction mixtures were handled under argon atmosphere and heated in fused silica ampoules to a moderate reaction temperature of 500 °C. Single
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Synthesis and structure refinement of the zinc hydroxide boracite: Zn3B7O13(OH) Z. Naturforschung B (IF 0.8) Pub Date : 2024-01-12 Raimund Ziegler, Sabrina Jungmann, Hubert Huppertz
The new zinc borate Zn3B7O13(OH) crystallizes trigonally in the space group R3c (no. 161) with the lattice parameters a = 849.76(3), c = 2099.8(2) pm, V = 1.3131(2) nm3, and six formula units per unit cell (Z = 6). It was synthesized at high-pressure/high-temperature conditions in a multianvil device. Single-crystal and powder X-ray diffraction experiments were conducted.
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Simultaneous different mechanisms for the efficient synthesis of β-enaminones: 12-tungstocobaltic acid-supported on nano silica as an electron transfer and Brønsted acid nano catalyst Z. Naturforschung B (IF 0.8) Pub Date : 2023-12-15 Mahtab Razlansari, Masoud Kahrizi
In the present study, 12-tungestocobaltic acid, H5CoW12O40, was immobilized on nano silica from rice husk (CoW@NSiO2) to develop a novel, efficient, heterogeneous and recyclable nano catalyst for the synthesis of β-enaminones. It is apparent from acidity and cyclic voltammetric measurements that, the catalyst is electroactive and undergoes reversible redox transitions, as well as it is contains strong
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Crystal structure and fluorescence-based sensor properties of a Metal-Organic Framework Z. Naturforschung B (IF 0.8) Pub Date : 2023-12-04 Jing-Lin Chang, Jun-Feng Wu, Jia-Wei Zhang, Kai Cui, Zhi-Qiang Liu
A Metal-Organic Framework (MOF) based on a tricarboxylic acid ligand (H3L = biphenyl-2,4′,5-tricarboxylic acid), namely [Cd3(L)2(H2O)4] (1), had been prepared and characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction (PXRD), thermogravimetric analyses (TGA), and single-crystal X-ray diffraction. Fluorescence studies showed that 1 has high quenching efficiency for testing acetone
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Synthesis and crystal structure of the zinc borate Zn6B22O39·H2O Z. Naturforschung B (IF 0.8) Pub Date : 2023-11-17 Raimund Ziegler, Hubert Huppertz
The synthesis and crystal structure of Zn6B22O39·H2O are described. This new zinc borate was synthesized at 7 GPa and 1523 K in a multianvil device. It crystallizes in the orthorhombic space group Pnma (no. 62) with the lattice parameters a = 818.77(4), b = 768.42(3), c = 1744.82(9) pm, V = 1.09777(9) nm3, and two formula units per unit cell (Z = 2). The structure is closely related to those of M 6B22O39·H2O
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The crystal and molecular structure of 1-ferrocenyl-3,3-bis(methylthio)prop-2-en-1-one Z. Naturforschung B (IF 0.8) Pub Date : 2023-11-14 Vedaant Kumar, Kathleen L. May, Alan J. Lough, Robert A. Gossage
The title compound 1-ferrocenyl-3,3-bis(methylthio)prop-2-en-1-one (1), a key intermediate in the synthesis of ferrocene-containing heterocycles, has been characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space group P21/c with 8 molecules in the unit cell. Unit cell parameters are 12.8159(10), 10.8121(9), and 20.8411(16) Å for a, b and c, respectively with
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Synthesis, structures and photophysical properties of two new Cu(I) complexes Z. Naturforschung B (IF 0.8) Pub Date : 2023-11-07 Xiaojuan Sun, Zhiqiang Wang
Two cationic heteroleptic four-coordinate Cu(I) complexes were successfully synthesized and characterized by 1H NMR, 13C NMR, 31P NMR spectroscopy and mass spectrometry. The crystal structures of the complexes have been determined by single-crystal X-ray diffraction. UV/Visible absorption spectra of these complexes show ligand-centered π-π* and charge transfer transitions. In the solid state the complexes
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Heat capacity of sodium and potassium hexafluorophosphate Z. Naturforschung B (IF 0.8) Pub Date : 2023-10-28 Konrad Burkmann, Bastian Hansel, Franziska Habermann, Bianca Störr, Martin Bertau, Florian Mertens
The heat capacities of NaPF6 and KPF6 were measured in a broad temperature range using differential scanning calorimetry. The suitability of applying a modified Neumann Kopp rule to calculate the heat capacity of “PF6” was evaluated in order to obtain a general method to predict the heat capacities of other hexafluorophosphates.
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Zur Kenntnis ternärer Oxoarsenate(III) dreiwertiger Lanthanoide: Synthese und Charakterisierung von LnAsO3- und Ln 2As4O9-Vertretern mit Ln = La und Ce sowie Ln = Pr, Nd, Sm–Gd Z. Naturforschung B (IF 0.8) Pub Date : 2023-10-09 Ralf J. C. Locke, Florian Ledderboge, Thomas Schleid
The title compounds have been prepared from the elemental lanthanoids and arsenic sesquioxide in 1:1 and 2:3 molar ratios in the presence of a cesium-halide flux at temperatures near 1000 °C generating elemental arsenic as the by-product. With the preparation of B-type La[AsO3] crystallizing in the monoclinic space group P21/c with the lattice parameters a = 904.03(8), b = 789.96(7), c = 837.49(7)
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A switch from ferro- to antiferromagnetic ordering in the solid solutions CeAuGe1−x Sn x Z. Naturforschung B (IF 0.8) Pub Date : 2023-10-03 Maximilian Kai Reimann, Wilma Pröbsting, Aylin Koldemir, Jana Palms, Rainer Pöttgen
CeAuGe and CeAuSn (both NdPtSb type, space group P63 mc) form a complete solid solution CeAuGe1−x Sn x with Vegard-type behavior of the cell volume. Samples with steps of x = 0.1 were synthesized from the pure elements by arc-melting. The structure of CeAuGe0.13(2)Sn0.87(2) was refined from single-crystal X-ray diffractometer data: a = 469.10(6), c = 773.90(10) pm, wR 2 = 0.0359, 251 F 2 values and
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Crystal structures and luminescence properties of Li6 MN4:Ce3+ (M = Mo, W) Z. Naturforschung B (IF 0.8) Pub Date : 2023-09-21 Martin Klotz, Markus Seibald, Dominik Baumann, Klaus Wurst, Gunter Heymann, Hubert Huppertz
The compounds Li6MoN4 and Li6WN4 were prepared from the reactants M (M = Mo, W) and Li3N in a radiofrequency furnace at 1000 °C. The lithonitridometallates crystallize in the tetragonal system with the lattice parameters: a = 6.6844(1), c = 4.9294(1) Å for Li6WN4 based on single-crystal X-ray diffraction data and a = 6.6611(3), c = 4.9338(3) Å for Li6MoN4 taken from powder X-ray diffraction data. Colorless
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Syntheses, characterization and properties of copper, silver and palladium complexes with oxazoline-containing ligands Z. Naturforschung B (IF 0.8) Pub Date : 2023-09-20 Tao Hu, Wei Zhou, Hai-Wei Kuai, Hai-Ming Zhang
The reactions of copper, silver and palladium salts with the homochiral ligands 3,3′-bis[(S,S)-4-isopropyl-2-oxazolyl]-4-chloro-2,2′-bipyridine (L1), 3,3′-bis[(S,S)-4-benzyl-2-oxazolyl]-4-chloro-2,2′-bipyridine (L2) and 2-[(S)-4-isopropyl-2-oxazolyl]quinoline (L3) yield three new chiral complexes: [Cu(L1)Br2] (1), [Ag(L2)(CH3CN)]·(BF4)·(CH3OH)0.17·(H2O)0.08 (2) and [Pd(L3)Cl2]·(CH3COCH3)0.5 (3), which
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A zinc coordination compound showing green photoluminescence Z. Naturforschung B (IF 0.8) Pub Date : 2023-09-19 Yu-Shu Zhu, Cui-Er Deng, Xue-Chun Zhang, Kun-Lin Huang, Xi Liu
A novel three-dimensional coordination compound has been solvothermally synthesized based on a tetracarboxylate ligand H4L (H4L = 1,3,6,8-tetrakis(4-carboxylphenyl)pyrene), Zn2L(H2O)2·2DEF (1) (DEF = N,N′-diethylformamide). Each Zn ion is coordinated by four carboxylate oxygen atoms from four L4− ligands and one oxygen atom from a water molecule to provide a distorted square-pyramidal geometry. Pairs
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Cementite-type Y3Ru Z. Naturforschung B (IF 0.8) Pub Date : 2023-09-13 Valentin Antoine Chamard, Samir F. Matar, Lars Schumacher, Christian Paulsen, Jutta Kösters, Theresa Block, Rainer Pöttgen
Single crystals of Y3Ru were obtained as a side product during phase analytical studies of yttrium-rich compounds in the system Y–Ru–Zn. The structure of Y3Ru was refined from single-crystal X-ray diffractometer data: Fe3C type, Pnma, a = 732.51(7), b = 925.61(8), c = 633.66(10) pm, wR = 0.0639, 811 F 2 values, 23 variables. The ruthenium atoms have coordination number 9 in form of a strongly distorted
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Electrocatalytic hydrogen evolution at carbon paste electrodes doped with a manganese(II) imidazoledicarboxylate complex Z. Naturforschung B (IF 0.8) Pub Date : 2023-09-12 Zhengwei Wu, Tiantian Wan, Xiaoxia Kong, Qinqin Shen, Kaiyi Li, Huilu Wu
A mononuclear Mn(II) complex [Mn(p-MOPhH2IDC)2(H2O)2]·2(DMF), was synthesized by the reaction of p-MOPhH3IDC (2-(4-methoxyphenyl)-1H-imidazole-4,5-dicarboxylic acid) and Mn(CH3COO)2·4H2O under solvothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, IR and UV–vis spectroscopy. The structure analysis revealed that the manganese(II) center has a six-coordinated
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Crystal structure of the quaternary lithogallate Sr2LiGaO4 Z. Naturforschung B (IF 0.8) Pub Date : 2023-09-06 Johannes G. Volpini, Gregor J. Hoerder, Markus Seibald, Dominik Baumann, Hubert Huppertz
The new quaternary lithogallate Sr2LiGaO4 was prepared by conventional solid-state synthesis in a welded tantalum ampoule at T = 850 °C. Single-crystal X-ray diffraction was used to elucidate the crystal structure of the compound, which crystallizes in the orthorhombic space group Pnma (no. 62) with the lattice parameters a = 11.2434(4), b = 5.6879(2), and c = 6.6983(2) Å. The phase composition of
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tert-Butyldichlorophosphane: crystal structure and its reactivity towards supersilyl sodium Z. Naturforschung B (IF 0.8) Pub Date : 2023-09-06 Lothar Fink, Marcel Bamberg, Edith Alig, Hans-Wolfram Lerner
Crystals of tBuPCl2 were obtained by a short-path sublimation at 80 °C/0.150 mbar. The structure determination of tBuPCl2 was based on X-ray powder data. The measurements were carried out in a temperature range from 173 K to r. t. At 173 K the X-ray powder pattern has been assigned to an orthorhombic phase, and that at 213 K to a plastic-crystalline, cubic phase. We further investigated the reactivity
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[RuCl2(dppf)(PN)]/Pd-cocatalyzed three-component synthesis of 2-pyridinyl-6-arylquinolines Z. Naturforschung B (IF 0.8) Pub Date : 2023-08-31 Hao Wang, Pengtao Bai, Shuo Wen, Jingjing Wei, Heng Song, Chen Xu
A new complex [RuCl2(dppf)(PN)] 1 (dppf = 1,1′-bis(diphenylphosphino) ferrocene; PN = (2-diphenylphosphino)benzenamine) has been synthesized and characterized. Its structure was determined by single-crystal X-ray diffraction. An efficient 1/Pd salt-cocatalyzed three-component oxidation/cyclization/Suzuki reaction for the synthesis of 2-pyridinyl-6-arylquinolines from 2-acetylpyridine, (2-amino-5-bromophenyl)methanol
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Comparative study of Fe2B3O7 and Mn4(B6O13(OH)): a new structure linking melilite and johachidolite Z. Naturforschung B (IF 0.8) Pub Date : 2023-08-18 Leonard C. Pasqualini, Hubert Huppertz
The two compounds Fe2B3O7 (a = 663.61(4), c = 438.39(3) pm, space group: P 4 ‾ $\overline{4}$ 21 m) and Mn4(B6O13(OH)) (a = 445.14(1), b = 683.56(2), c = 1330.34(3) pm, β = 90.42(1)°, space group: P21/c) were synthesized under high-pressure/high-temperature conditions of 9 GPa and 800 °C. Their crystal structures have been determined via single-crystal X-ray diffraction and the occurring side-phases
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Ternary Laves phases with the MgCu4Sn-type structure: RECo4Mg (RE = Gd, Dy–Tm, Lu), EuNi4Mg and RET 4Cd (RE = Y, La–Nd, Sm, Gd–Dy; T = Cu, Pt) Z. Naturforschung B (IF 0.8) Pub Date : 2023-08-11 Maximilian Kai Reimann, Michael Johnscher, Theresa Block, Judith Bönnighausen, Rainer Pöttgen
Twenty five new ternary Laves phases RET 4Mg and RET 4Cd (RE = rare earth element; T = Co, Ni, Cu, Pt) have been synthesized from the elements using niobium or tantalum tubes as inert crucible materials. The lattice parameters have been derived from powder X-ray diffraction data. The structures of Ce1.41(1)Co4Mg0.59(1), Dy1.10(1)Co4Mg0.90(1), LaPt4Cd, Y1.10(1)Cu4Cd0.90(1), Ca0.93(1)Cd0.07(1)Pd2 and
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Synthesis of nickel borides in molten salts at elevated temperatures and thermodynamic characterization of the system Ni–B Z. Naturforschung B (IF 0.8) Pub Date : 2023-07-15 Konrad Burkmann, Bianca Störr, Jürgen Seidel, Klaus Bohmhammel, Florian Mertens
This article focuses on the synthesis of nickel borides in different molten-salt systems (eutectic NaCl/KCl and borax) at elevated temperatures. The differences in the thermodynamic stability of different nickel borides and the formation of NiB in an eutectic halite-sylvine mixture at T = 950 °C with different nickel-containing starting materials (NiO, Ni) has been elucidated. The results are compared
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A copper(I) coordination polymer with 3-cyanopyridine ligands Z. Naturforschung B (IF 0.8) Pub Date : 2023-07-10 Cui-Er Deng, Yu-Shu Zhu, Xue-Chun Zhang, Yan-Lin Tao, Xi Liu
A coordination polymer Cu(3-CP)3(NO3) (1) was synthesized from copper(II) sulfate and 3-cyanopyridine (3-CP) with in-situ reduction by hydroxylamine sulfate via the solvent evaporation method at room temperature, and structurally characterized by single-crystal X-ray diffraction and elemental analysis. Complex 1 exhibits a structure formed by cationic [Cu(3-CP)3] n n+ chains and NO3 − anions with abundant
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Selective oxidation of benzene to phenol in the liquid phase over copper-substituted LaFeO3 perovskite oxide as catalyst Z. Naturforschung B (IF 0.8) Pub Date : 2023-06-26 Rajib Mistri
Selective oxidation of benzene to phenol is done in the liquid phase over copper-substituted LaFeO3 perovskite oxides as catalyst using H2O2 as oxidant under mild reaction conditions. Among the different copper-substituted perovskite catalysts synthesized by a novel solution combustion method, the LaFe0.90Cu0.10O3 catalyst showed highest activity (∼56 % with 100 % selectivity of phenol) and also gives
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Synthesis, characterization, luminescence, and catalytic properties of a zinc(II) complex with a N,O-donor ligand generated in situ from topiroxostat Z. Naturforschung B (IF 0.8) Pub Date : 2023-06-22 Chen-Chen Qin, Zhong-Hua Sun, Xin Rong, Sheng-Chun Chen, Ming-Yang He, Qun Chen
By utilizing the well-known selective xanthine oxidase inhibitor topiroxostat, a new zinc(II) complex Zn(L)2(H2O)2 (1) [HL = 4-(3-(pyridine-4-yl)-1H-1,2,4-triazol-5-yl)picolinic acid] has been hydrothermally synthesized, involving in-situ ligand formation upon hydrolysis of topiroxostat. The complex has been structurally characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis
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A Cd(II) MOF based on 5-ethoxyisophthalate and 1,3-bis(4-pyridyl)propane ligands with a twofold interpenetrated crystal structure showing room temperature phosphorescence Z. Naturforschung B (IF 0.8) Pub Date : 2023-06-15 Ying-Jun Chen, Pei-Pei Yin, Shu-Xian Ren, Zhi-Hua Li, Xiao-Gang Yang
A metal-organic framework (MOF) {[Cd(EtOIPA)(bpp)(H2O)]·2H2O} n (1) has been synthesized under basic hydrothermal conditions by using of 5-ethoxyisophthalic acid (EtOIPAH2) and 1,3-bis(4-pyridyl)propane (bpp) as reagents for cadmium nitrate. Compound 1 was characterized by elemental analysis, single-crystal X-ray diffraction and UV/Vis spectroscopy. In 1, the bpp ligands extend the EtOIPA-Cd chains
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LaNiIn1–x Sn x and CeNiIn1–x Sn x solid solutions at T = 870 K Z. Naturforschung B (IF 0.8) Pub Date : 2023-06-13 Galyna Nychyporuk, Nataliya Dominyuk, Ihor Muts, Anatoliy Zelinskiy, Rainer Pöttgen, Vasyl Zaremba
The solid solutions LaNiIn1–x Sn x and CeNiIn1–x Sn x were studied by means of X-ray powder diffraction and EDX analyses in the full concentration range for samples annealed at T = 870 K. The limited solubility of the fourth component in the starting compounds with equiatomic composition, and the limits and the unit cell parameters of the solid solutions have been determined. The crystal structure
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Synthesis, structure, and reactivity of the ferrocene-based N-heterocyclic stannylene [Fe{(η 5-C5H4)NC6H3-2,6-iPr2}2Sn] Z. Naturforschung B (IF 0.8) Pub Date : 2023-06-08 Nadine Weyer, Clemens Bruhn, Ulrich Siemeling
The N-heterocyclic stannylene [Fe{(η 5-C5H4)NC6H3-2,6-iPr2}2Sn] (1) has been synthesised from SnCl2 and the lithium amide [Fe{(η 5-C5H4)NC6H3-2,6-iPr2}2Li2]. Compound 1 is inert towards H2, CO, CO2, and MeI under ambient conditions. Immediate hydrolysis and ammonolysis was observed with H2O and NH3, respectively. While oxidation reactions of 1 with chalcogens (O2, S8, Se8) afforded only intractable
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Crystal structure of the ternary silicide ErNi4.04Si0.96 Z. Naturforschung B (IF 0.8) Pub Date : 2023-06-05 Bohdana Belan, Mariya Dzevenko, Dorota A. Kowalska, Roman Gladyshevskii
The ternary silicide ErNi4.04Si0.96 was synthesized by arc-melting of stoichiometric quantities of the elements, and its crystal structure has been determined using single-crystal X-ray diffraction data. The compound crystallizes in the CaCu5 structure type: hexagonal space group P6/mmm, Pearson code hP6, Z = 1; a = 4.874(3), c = 3.959(2) Å, V = 81.5(1) Å3; R1 = 0.0239, wR2 = 0.0503, for 67 independent
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About the pseudo-ternary alkali metal-thallium(I) dicyanamide systems Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-23 Olaf Reckeweg, Falk Lissner, Björn Blaschkowski, Thomas Schleid
Metathesis reactions designed to produce nominally the pseudo-ternary ATl[N(CN)2]2 compounds (A = Li, Na, K, Rb or Cs) either yielded solid solutions or separated pseudo-binary dicyanamides next to the new compounds LiTl[N(CN)2]2 and Tl0.89(1)Cs0.11(1)[N(CN)2]. Tetragonal LiTl[N(CN)2]2 (a = 724.96(2), c = 1411.77(6) pm, Z = 4) is crystallizing isotypically with LiK[N(CN)2]2 in the space group I4/mcm
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Synthesis and characterization of diphenyl(pentachlorophenyl)phosphanegold(I) chloride Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-23 Peter Heinrichs, Hans-Georg Stammler, Norbert W. Mitzel
Diphenyl(pentachlorophenyl)phosphanegold(I) chloride was synthesized and characterized via NMR spectroscopy, elemental analysis and X-ray diffraction.
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Aminosilyl-substituted cyclopentadienyl complexes of alkali metals Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-19 Media Mohamad, Jessica Lambert, Lisa Wirtz, Bernd Morgenstern, André Schäfer
(Pyrrolidinyldimethylsilyl)tetramethylcyclopentadienide complexes of lithium, sodium and potassium were synthesized and characterized, including crystal structure determinations. The lithium cyclopentadienide compound was used as a Cp transfer reagent to prepare the corresponding ferrocene, stannocene and plumbocene.
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SrMg2Ga2 with ThCr2Si2-type structure Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-19 Maximilian Kai Reimann, Samir F. Matar, Rainer Pöttgen
The gallide SrMg2Ga2 was obtained by direct reaction of the elements in a sealed tantalum ampoule. Single crystals were grown by slowly cooling the sample within a muffle furnace. The SrMg2Ga2 structure was refined from single crystal X-ray diffractometer data: I4/mmm, a = 450.52(7), c = 1169.39(18) pm, wR2 = 0.0349, 164 F 2 values, 11 variables. The magnesium and gallium atoms build up a three-dimensional
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Cobalt(II) and nickel(II) complexes based on 2,5-di(pyridine-4-yl)thiazolo[5,4-d]thiazole and dicarboxylate ligands: synthesis, structures and properties Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-16 Jing Ai, Lei Yang, Zhong Zhen Tian
Two metal coordination polymers [Ni(oba)(Py2TTz)1.5(H2O)]·2H2O·DMF (1) and [Co(oba)(Py2TTz)(H2O)4]·2H2O (2) have been synthesized under solvothermal conditions [H2oba = 4,4′-oxybis(benzoic acid) and Py2TTz = 2,5-di(pyridine-4-yl)thiazolo[5,4-d]thiazole]. Crystals of compound 1 belong to the orthorhombic system, space group Ibam, with a = 38.928(8), b = 7.7113(14), c = 28.508(6) Å, V = 8558(3) Å3, Z
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Crystal structure of the oxidotechnetate(V) complex Na2[(TcVO)(OTf)5] · 2(TfOH) with TfOH = trifluoromethanesulfonic acid Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-11 Markus Zegke, Aida Raauf, Jörg-M. Neudörfl, Erik Strub
The autoreduction of ammonium pertechnetate in solutions of trifluoromethanesulfonic acid (triflic acid, TfOH) and trifluoromethanesulfonic anhydride (triflic anhydride, TfOTf) results, in the presence of sodium ions, in the formation of the complex Na2[(TcVO)(OTf)5] · 2(TfOH). Its structure has been determined by single-crystal X-ray diffraction.
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Design, synthesis, and in-silico study of new letrozole derivatives as prospective anticancer and antioxidant agents Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-11 Raad S. Jihad, Nabeel A. Abdul-Rida, Amer M. J. Al-Shamari, Najim A. Al-Masoudi, Bahjat A. Saeed
A new series of derivatives (compounds 8–20) of the breast antihormonal drug letrozole tagged with additional aryl groups were synthesized starting from the letrozole analog 7 via Suzuki cross-coupling reaction. Treatment of the ketone 9 with various aldehydes in base afforded the chalcone analogs 21–27. The structural assignments were done by IR, 1H, 13C and 2D NMR spectra. Compounds 13, 21–23, 25
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Tb2Co(B2O5)2 and Tb2Cu(B2O5)2 – two new borates with gadolinite-type structures Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-11 Tobias A. Teichtmeister, Michael M. Hladik, Gunter Heymann, Hubert Huppertz
Using high-pressure/high-temperature synthesis methods, it was possible to increase the number of known borates with a crystal structure derived from gadolinite. Syntheses of Tb2Co(B2O5)2 (8 GPa, 1000 °C) and Tb2Cu(B2O5)2 (11 GPa, 650 °C) were carried out in a Walker-type multianvil device. The crystal structures were determined by single-crystal X-ray diffraction methods and Rietveld refinements of
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Constitution of the fully supported gold(I)alkynyl (dmpme)·bis[gold(I)ethynyldimethylsilyl]methane in solution Z. Naturforschung B (IF 0.8) Pub Date : 2023-05-04 Peter Heinrichs, Andreas Mix, Norbert W. Mitzel
The dimetallacyclic complex H2C(Me2SiC≡CAuPMe2)2CH2 has been synthesized, in which the two gold centers are bridged by the diphosphine dmpme (= bis(dimethylphosphino)methane) and a diethynyl ligand providing “full support” for the possible transannular Au–Au contact (3). This compound and its “semi-” and “unsupported” analogues (2, 1) have been characterized by NMR spectroscopy and elemental analysis
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Mössbauer-spectroscopic characterization of the stannides Sr2Pd2Sn and Eu2Pd2Sn Z. Naturforschung B (IF 0.8) Pub Date : 2023-04-14 Joshua Wiethölter, Aylin Koldemir, Maximilian Kai Reimann, Theresa Block, Jutta Kösters, Oliver Janka, Rainer Pöttgen
The Ca2Pd2Ge-type stannides Sr2Pd2Sn and Eu2Pd2Sn were synthesized by reaction of the elements in sealed tantalum ampoules in a high-frequency furnace and characterized by powder X-ray diffraction. The structure of Sr2Pd2Sn (Fdd2, a = 1063.95(5), b = 1623.22(9), c = 594.63(14) pm, wR2 = 0.0472, 972 F 2 values and 26 variables) was refined from single-crystal X-ray diffractometer data. The striking
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Understanding formation of the InPd3 polymorphs: a DFT study Z. Naturforschung B (IF 0.8) Pub Date : 2023-04-14 Nilanjan Roy
The intriguing experimental results regarding the synthesis and structure types adopted by binary InPd3 have been fundamentally addressed using first-principles density functional theory calculations. Longer annealing time at higher temperature leads to stronger and more optimized heteroatomic In–Pd contacts that result in the extended ordering between them and leading to the ZrAl3 structure type.
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Eu2Ru3Si5 and Eu2Ir3Ga5 – first europium compounds with U2Mn3Si5-type structure but different europium valence Z. Naturforschung B (IF 0.8) Pub Date : 2023-03-29 Stefan Seidel, Thomas Harmening, Jutta Kösters, Aylin Koldemir, Wilma Pröbsting, Simon Engelbert, Rainer Pöttgen
The silicide Eu2Ru3Si5 was synthesized from the elements in a sealed tantalum tube in a high-frequency furnace, while the gallide Eu2Ir3Ga5 was obtained by arc-melting. Both structures were refined from single-crystal X-ray diffractometer data: P4/mnc, a = 1072.69(8), c = 569.55(5) pm, wR = 0.0453, 617 F 2 values, 31 variables for Eu2Ru3Si5 and a = 1122.18(7), c = 583.17(4) pm, wR = 0.0546, 729 F 2
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Expanding transition metal borate chemistry to include main group elements: high-pressure synthesis and structural relation of β-MgB4O7 Z. Naturforschung B (IF 0.8) Pub Date : 2023-03-27 Leonard C. Pasqualini, Hubert Huppertz
The high-pressure/high-temperature synthesis of β-MgB4O7 at 9 GPa and 1200 °C is presented. The determination of its crystal structure by single-crystal X-ray diffraction has shown that the compound is isotypic to the transition metal borates with the structure type of β-MB4O7 (M = Mn–Zn). β-MgB4O7 crystallizes in the orthorhombic space group Cmcm with the lattice parameters a = 10.848(2), b = 6.513(2)
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Sterically crowded di-indazolyl-pyridines: Iron(II) complexation studies Z. Naturforschung B (IF 0.8) Pub Date : 2023-03-17 Suhad Omar, Elisabeth Irran, Dennis Wiedemann, Dirk Baabe, Andreas Grohmann
4-(2,6-Di(2H-indazol-2-yl)pyridin-4-yl)benzoic acid (1) and 10-(2,6-di(1H-pyrazol-1-yl)pyridin-4-yl)anthracene-9-carboxylic acid (2) were required for adsorption studies on Ag(111), with a view to subsequent iron(II) complexation and formation of well-ordered spin-responsive self-assembled monolayers. While the generation of these compounds has remained elusive, several intermediates and by-products
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Solid-state molecular structures of Se(IV) and Te(IV) dihalides X2Se(CH3)(C6F5) and the gas-phase structure of Se(CH3)(C6F5) Z. Naturforschung B (IF 0.8) Pub Date : 2023-03-15 Timo Glodde, Beate Neumann, Hans-Georg Stammler, Norbert W. Mitzel
In a systematic study the Se(IV) and Te(IV) dihalides F2E(CH3)(C6F5), Cl2E(CH3)(C6F5) and Br2E(CH3)(C6F5) (E = Se, Te) have been synthesized and their crystal and molecular structures been investigated by X-ray diffraction and computational methods. The solid-state structures of all compounds show significant correlations between the lengths of the E–C1 bond and the intermolecular E···X (X = F, Cl
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A third polymorph of the zwitterionic complex trichlorido-((dimethylphosphoryl)methanaminium-κO)zinc(II) Z. Naturforschung B (IF 0.8) Pub Date : 2023-03-15 Guido J. Reiss
By the reaction of (dimethylphosphoryl)methanamine (dpma) with one equivalent of zinc(II) chloride in a concentrated hydrochloric acid solution and subsequent slow evaporation of the solvent, the title compound (dpmaH)ZnCl3 was obtained in quantitative yield. The primary reaction product mainly consists of larger brick-shaped colorless and smaller cuboide colorless crystals. Long-time storage over
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Catalyst-free direct synthesis of indeno[1,2-b]indol-5(4bH)-yl benzimidamides Z. Naturforschung B (IF 0.8) Pub Date : 2023-03-13 Mohsen A.-M. Gomaa, Doaa K. Hassan
A new series of indeno[1,2-b]indol-5(4bH)-ylbenzimidamide derivatives 3a–3j has been synthesized as potential casein kinase II (CK2) inhibitors. A convenient and straightforward synthesis protocol was used via a reaction of β-enaminones 1a–1j with ninhydrin 2. This transformation proceeds under mild conditions (boiling ethanol, 0.5 h) in absence of catalyst in good to excellent yields (66–86%). The