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Constructions of seven noncovalent-bonded supramolecules from reactions of Cu(II)/Cd(II)/Zn(II) with isonicotinamide and carboxylates
Inorganic and Nano-Metal Chemistry ( IF 1.4 ) Pub Date : 2021-01-05 , DOI: 10.1080/24701556.2020.1862207
Weiqiang Xu 1, 2 , KaiKai Hu 1, 2 , Shouwen Jin 1, 2 , Yuting Zhang 1, 2 , Daqi Wang 3
Affiliation  

Abstract

Transition metal carboxylates with O- and N-donor ligands are interesting for their structural features. Seven novel isonicotinamide(inic)-based metal complexes of [Cd(inic)2(L1)2(H2O)2] · 2H2O (1) (L1 = 2-chloronicotinate), [Cd(inic)2(L2)2(H2O)2] (2) (L2 = 2,4-dichlorobenzoate), [Cu(inic)2(L3)2] (3) (L3 = 4-chlorophenoxyacetate), [Cu3(inic)6(L4)2(HL4)2(H2O)2] · 2H2O (4) (L4 = azelate), [Zn(inic)2(L1)2(H2O)2] · (inic) · H2O (5), [Zn(inic)(L5)(H2O)4] (6) (L5 = 3-nitrophthalate) and [Zn2(inic)2(L6)2] · 5H2O (7) (L6 = 1,4-cyclohexanedicarboxylate) have been obtained by the introduction of the carboxylates by the common solution method and are structurally featured by different techniques of EA, IR spectra, TG and SCXRD analysis. The X-ray studies told that these complexes display mononuclear to trinuclear structures with octahedral/square-pyramidal geometry around the Zn2+, trigonal bipyramidal/octahedral at the Cu2+ and octahedral for the Cd2+. The inic in 17 are coordinated only in monodentate fashion with its ring N, while 5 has the lattice inic. The carboxylates coordinated to the metal in monodentate, chelating bidentate and bridging bidentate fashions. The pair of complementary N-H···O H-bonds from the CONH2 of the inic were found in all compounds except 7. Except 1 and 2, all other compounds bear the CH-O contacts from the pyridine CH of the inic. The intricate intra- and intermolecular classical H-bonds, CH-N, CH-O, CH-Cl, CH2-O, O-N, O-O, Cl-O, Cl-Cl, CH-π, CH2-π, C-π, N-π, Cl-π and π-π associations are elucidated by the X-ray crystallographic studies, which push the discrete complexes into high-dimensional ordered supramolecular structures.



中文翻译:

Cu(II)/Cd(II)/Zn(II)与异烟酰胺和羧酸盐反应构建七个非共价键超分子

摘要

具有 O 和 N 供体配体的过渡金属羧酸盐因其结构特征而令人感兴趣。[Cd(inic) 2 (L1) 2 (H 2 O) 2 ] · 2H 2 O (1) (L1  =  2-氯烟酸盐)、[Cd(inic) 2 ( L2) 2 (H 2 O) 2 ] (2) (L2  =  2,4-二氯苯甲酸盐), [Cu(inic) 2 (L3) 2 ] (3) (L3 = 4-氯苯氧基乙酸盐), [Cu 3 (inic) ) 6 (L4) 2(HL4) 2 (H 2 O) 2 ] · 2H 2 O (4) (L4 = azelate), [Zn(inic) 2 (L1) 2 (H 2 O) 2 ] · (inic) · H 2 O ( 5) , [Zn(inic)(L5)(H 2 O) 4 ] (6) (L5 = 3-硝基邻苯二甲酸酯) 和 [Zn 2 (inic) 2 (L6) 2 ] · 5H 2 O (7)(L6 = 1,4-环己烷二羧酸盐) 是通过常用溶液法引入羧酸盐而获得的,并通过 EA、IR 光谱、TG 和 SCXRD 分析的不同技术在结构上进行了表征。X 射线研究表明,这些配合物显示出单核到三核结构,在 Zn 2+周围具有八面体/方形锥体几何形状,在 Cu 2+处为三角双锥体/八面体,而 Cd 2+则为八面体。17中的 inic仅与其环 N 以单齿方式协调,而5有格子 inic。羧酸盐以单齿、螯合双齿和桥接双齿方式与金属配位。除了7外,所有化合物中都发现了来自 inic的 CONH 2的一对互补的 NH…O氢键。除了12 之外,所有其他化合物都带有来自 inic 的吡啶 CH 的 CH-O 触点。复杂的分子内和分子间经典 H 键,CH-N、CH-O、CH-Cl、CH 2 -O、ON、OO、Cl-O、Cl-Cl、CH-π、CH 2 -π、C -π、N-π、Cl-π 和 π-π 结合由 X 射线晶体学研究阐明,将离散复合物推向高维有序超分子结构。

更新日期:2021-01-05
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