The crystal structure of the monomeric vanadium(III) species mer-[V(bipy)Cl3(MeCN)] (1; bipy = 2,2′-bipyridine) is reported. The solvothermal reaction of [V(bipy)Cl3(MeCN)]with Na(O2CPh) yields the T-shaped cluster [V3(O)Cl3(O2CPh)2(bipy)2(OEt)2], magnetic studies of which show strong intramolecular antiferromagnetic coupling giving a well isolated S = 1 ground state. Solvothermal treatment of 1 with triols yields a series of polymetallic clusters [V4Cl6(thme)2(bipy)3], [V3Cl4(Hcht)2(bipy)2]Cl and [V8(OH)2Cl4(cht)4(O2CPh)6(bipy)2], structurally related to previously reported M4} centred triangles. Magnetic studies of this series reveal very weak intramolecular antiferromagnetic exchange and very strong local zero-field splitting effects.
单体
铌(III)物种 mer-[V(bipy)Cl3(MeCN)] (1; bipy =
2,2'-联吡啶) 的晶体结构已被报道。用 Na(O2
CPh) 处理 [V(bipy)Cl3(MeCN)] 的溶剂热反应生成 T 形簇 [
V3(O)Cl3(O2
CPh)2(bipy)2(OEt)2],其磁性研究显示强烈的分子内反
铁磁耦合,形成良好分离的 S = 1 基态。对 1 进行三醇的溶剂热处理,得到一系列多
金属簇 [V4Cl6(thme)2(bipy)3]、[
V3Cl4(Hcht)2(bipy)2]Cl 和 [V8(OH)2Cl4(cht)4(O2
CPh)6(bipy)2],这些结构与之前报道的
M4} 中心三角形相关。该系列的磁性研究揭示出极弱的分子内反
铁磁交换和非常强的局部零场劈裂效应。