کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1307074 | 975119 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Iron and cobalt complexes of 2,6-diacetylpyridine-bis(R-thiosemicarbazone) (R = H, phenyl) showing unprecedented ligand deviation from planarity Iron and cobalt complexes of 2,6-diacetylpyridine-bis(R-thiosemicarbazone) (R = H, phenyl) showing unprecedented ligand deviation from planarity](/preview/png/1307074.png)
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) (H2L1) and 2,6-diacetylpyridinebis(phenylthiosemicarbazone) (H2L2), 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.
Complexes of 2,6-pyridinebis(R-thiosemicarbazone) with iron and cobalt show a number of structural types. One complex, which is relevant to the active site structure of cobalt nitrile hydratase, displays unprecedented twisting of the ligand to accommodate pseudo-octahedral coordination.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 362, Issue 4, 2 March 2009, Pages 1348–1354