Panja Anangamohan, Campana Charles, Leavitt Christopher, Van Stipdonk Michael J, Eichhorn David M
Department of Chemistry, Wichita State University, Wichita, KS 67260, USA.
Inorganica Chim Acta. 2009 Mar 2;362(4):1348-1354. doi: 10.1016/j.ica.2008.06.031.
The syntheses, characterization, and single-crystal X-ray crystal structures are reported for four complexes of iron and cobalt with the pentadentate ligands, 2,6-diacetylpyridinebis(thiosemicarbazone) (H(2)L(1)) and 2,6-diacetylpyridinebis-(phenylthiosemicarbazone) (H(2)L(2)), including a cobalt dimer displaying a deviation from planarity which is unprecedented for this class of ligands and allows the ligand to occupy five positions of a pseudo-octahedral coordination sphere. This dimer reacts with KCN to produce a mononuclear complex of relevance to the active site of cobalt nitrile hydratase.
报道了铁和钴与五齿配体2,6 - 二乙酰基吡啶双（硫代半卡巴腙）（H₂L₁）和2,6 - 二乙酰基吡啶双（苯硫代半卡巴腙）（H₂L₂）形成的四种配合物的合成、表征及单晶X射线晶体结构，其中包括一种钴二聚体，该二聚体显示出与平面性的偏差，这对于此类配体来说是前所未有的，并且使得配体能够占据伪八面体配位球的五个位置。这种二聚体与KCN反应生成一种与钴腈水合酶活性位点相关的单核配合物。
