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Discrete and 1D Polymeric Copper(II) Complexes of Tetranuclear Cubane‐like Units: Structural and Magnetic Characterization
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-09-11 , DOI: 10.1002/slct.201801677
Subal Chandra Manna 1 , Soumen Manna 1 , Soumen Mistri 1 , Apu Patra 1 , Ennio Zangrando 2 , Horst Puschmann 3 , P. A. Goddard 4 , S. Ghannadzadeh 5
Affiliation  

Two novel copper(II) complexes, [Cu4(L)2(LH)2(H2O)2]2(NO3)2. (pydc).9H2O (1) and {[Cu4(L)2(LH)2(H2O)2(ppda)].5H2O}n (2) [H2L=2‐[(2‐hydroxy‐ethylimino)‐methyl]‐6‐methoxy‐phenol, pydc=pyridine‐3,5‐dicarboxylate, ppda=phenylene‐1,4‐diacrylate]have been synthesized and characterised by X‐ray single crystal diffraction analysis and low temperature magnetic study. The structural determination reveals for complex 1 a tetranuclear species exhibiting a double‐open cubane like core framework, whereas use of ppda anions results 1D coordination polymer where tetranuclear double‐open cubane cores are connected by bridging ppda ligands. In both the complexes, hydrogen bonding interactions lead to 3D supramolecular structures. Low temperature magnetic study indicates antiferromagnetic coupling in both the complexes. A model based on an effective square tetramer of Heisenberg spins was used to determine exchange strengths of 174(2) K for 1 and 107.4(4) K for 2.

中文翻译:

四核类库班单元的离散和一维聚合铜(II)配合物:结构和磁性表征

两种新型的铜(II)配合物,[Cu 4(L)2(LH)2(H 2 O)2 ] 2(NO 32。(pydc).9H 2 O(1)和{[Cu 4(L)2(LH)2(H 2 O)2(ppda)]。5H 2 O} n2)[H 2已经合成了L = 2-[((2-羟基-乙基亚氨基)-甲基] -6-甲氧基-苯酚,pydc =吡啶-3,5-二羧酸酯,ppda =亚苯基-1,4-二丙烯酸酯),并通过X-进行了表征射线单晶衍射分析和低温磁学研究。结构测定表明,对于复合物1,一个四核物种显示出一个像核骨架一样的双开库纳分子,而使用ppda阴离子可产生一维配位聚合物,其中四核双开库纳核心通过桥接ppda配体相连。在这两种络合物中,氢键相互作用均导致3D超分子结构。低温磁研究表明两种复合物中都存在反铁磁耦合。使用基于海森堡自旋的有效方形四聚体的模型来确定174(2)K的交换强度1和107.4(4)K表示2
更新日期:2018-09-11
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