Copper(II) halide complexes of aminopyridines: Synthesis, structure, and magnetic behavior of neutral compounds of 5-IAP: (5-IAP)2CuCl2·H2O, [(5-IAP)2CuBr2]2, (5-IAP)2CuBr2 and (5-IAP)3CuCl2·nH2O (5IAP = 2-amino-5-iodopyridine)
Copper(II) halide complexes of aminopyridines: Synthesis, structure, and magnetic behavior of neutral compounds of 5-IAP: (5-IAP)2CuCl2·H2O, [(5-IAP)2CuBr2]2, (5-IAP)2CuBr2 and (5-IAP)3CuCl2·nH2O (5IAP = 2-amino-5-iodopyridine)
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氨基吡啶的铜(II)卤化物配合物：5-IAP中性化合物的合成、结构和磁性行为：(5-IAP)2CuCl2·H2O、[(5-IAP)2CuBr2]2、(5-IAP)2CuBr2和
DOI：
10.1016/j.poly.2023.116562
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发表时间：
2023
期刊：
影响因子：
2.6
通讯作者：
Wikaira, Jan L.
中科院分区：
文献类型：
--
作者：
Huynh, Nathan V.;Li, Lixin;Landee, Christopher P.;Dawe, Louise N.;Dickie, Diane A.;Turnbull, Mark M.;Wikaira, Jan L.
在醇溶液中，2-氨基-5-碘吡啶（5IAP）与溴化铜（II）或氯化物反应生成4种配位配合物：[(5-IAP)2CuCl2](H2O)(1)、（5-IAP）2CuBr2(2)、[(5-IAP)2CuBr2]2(3)和[(5-IAP)3CuCl2](H2O)n(4)。通过单晶x射线衍射和变温磁化率测试对化合物进行了表征。1与5IAP配体以合成构象和一个晶格水分子结晶为单体。2也表现为5IAP配体，但形成一个常见的溴双桥二聚体结构。3是2的构象多态性，具有反取向的5IAP配体。长Cu⋯Br接触将分子连接成链。4结晶时有1.67个晶格水分子，在三个位置上无序。这四种化合物都表现出强烈的卤素键。在1 - 3.1 K的顺磁性上获得了变磁场和温度磁数据，在1.8 K以下没有磁交换的迹象。2是一个反铁磁二聚体（J/kB= - 22 K），二聚体之间有明显的反铁磁相互作用。3为均匀反铁磁链（J/kB= - 6 K），链间相互作用弱。
Reaction of 2-amino-5-iodopyridine (5IAP) with copper(II) bromide or chloride in alcoholic solution led to four coordination complexes: [(5-IAP)2CuCl2](H2O) (1), (5-IAP)2CuBr2(2), [(5-IAP)2CuBr2]2(3) and [(5-IAP)3CuCl2](H2O)n(4). The compounds were characterized by single crystal X-ray diffraction and variable temperature magnetic susceptibility measurements.1crystallizes as monomeric units with the 5IAP ligands in thesyn-conformation and one lattice water molecule.2also exhibitssyn-conformation 5IAP ligands, but forms a common bromide bibridged dimer structure.3is a conformational polymorph of2withanti-oriented 5IAP ligands. Long Cu⋯Br contacts link the molecules into chains.4crystallizes with 1.67 lattice water molecules, disordered over three positions. All four compounds exhibit strong halogen bonding. Variable field and temperature magnetic data were obtained on1–3.1is paramagnetic, with no indication of magnetic exchange down to 1.8 K.2is well modeled as an antiferromagnetic dimer (J/kB= −22 K) with significant antiferromagnetic interactions between the dimers.3is well modeled as a uniform antiferromagnetic chain (J/kB= −6 K) with weak interchain interactions.