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双(1H-咪唑-κN)双(2-氧化吡啶鎓-3-羧基-κO,O)钴(II)

Bis(1H-imidazole-κN)bis-(2-oxidopyridinium-3-carboxyl-ato-κO,O)cobalt(II).

作者信息

Zhang Bing-Yu, Nie Jing-Jing, Xu Duan-Jun

机构信息

Department of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China.

出版信息

Acta Crystallogr Sect E Struct Rep Online. 2009 Jul 25;65(Pt 8):m987-8. doi: 10.1107/S1600536809028694.

DOI:10.1107/S1600536809028694
PMID:21583429
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2977295/
Abstract

In the mol-ecule of the title Co(II) complex, [Co(C(6)H(4)NO(3))(2)(C(3)H(4)N(2))(2)], the Co(II) atom is located on a twofold rotation axis and chelated by two oxidopyridiniumcarboxyl-ate anions and further cis-coordinated by two imidazole ligands in a distorted octa-hedral geometry. The shorter C-O bond distance of 1.260 (2) Å suggests electron delocalization between the oxido group and the pyridinium ring. The uncoordinated carboxyl-ate O atom links with the imidazole and pyridinium rings of adjacent mol-ecules via N-H⋯O hydrogen bonding. Weak C-H⋯O hydrogen bonding is also present in the crystal structure.

摘要

在标题化合物钴(II)配合物[Co(C₆H₄NO₃)₂(C₃H₄N₂)₂]的分子中,钴(II)原子位于二重旋转轴上,由两个氧化吡啶羧酸根阴离子螯合,并进一步与两个咪唑配体顺式配位,形成扭曲的八面体几何构型。较短的C-O键长为1.260(2)Å,表明氧基团和吡啶环之间存在电子离域。未配位的羧酸根O原子通过N-H⋯O氢键与相邻分子的咪唑环和吡啶环相连。晶体结构中还存在弱的C-H⋯O氢键。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5c51/2977295/4e41d43b0d22/e-65-0m987-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5c51/2977295/4e41d43b0d22/e-65-0m987-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5c51/2977295/4e41d43b0d22/e-65-0m987-fig1.jpg

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