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链状聚[[三水合镉（II）]-μ(2)-吡嗪-2,3-二羧酸根]的一种新多晶型物。

A new polymorph of catena-poly[[tri-aqua-cadmium(II)]-μ(2)-pyrazine-2,3-dicarboxyl-ato].

作者信息

Yin Hua

机构信息

Instrumental Measurement and Analysis Center, Fuzhou University, Fuzhou, Fujian 350002, People's Republic of China.

出版信息

Acta Crystallogr Sect E Struct Rep Online. 2009 Jul 22;65(Pt 8):m971. doi: 10.1107/S1600536809028268.

DOI:10.1107/S1600536809028268
PMID:21583415
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2977175/
Abstract

The title complex, Cd(C(6)H(2)N(2)O(4))(H(2)O)(3), is a new monoclinic polymorph. The ortho-rhom-bic form has previously been reported [Ma et al. (2006 ▶). Acta Cryst. E62, m2528-m2529]. The Cd-N and Cd-O bond lengths range from 2.265 (3) to 2.333 (3) Å; a weak Cd-O inter-action is also present, the inter-atomic distance being 2.658 (4) Å. The Cd(II) ions, which have a distorted penta-gonal-bipyramidal geometry, are bridged by pyrazine-2,3-dicarboxyl-ato ligands, forming a zigzag chain structure. The chains are connected by O-H⋯O hydrogen bonds into a three-dimensional framework.

摘要

标题配合物[Cd(C₆H₂N₂O₄)(H₂O)₃]ₙ是一种新的单斜晶系多晶型物。之前已报道过其正交晶型[Ma等人，(2006 ▶)。《晶体学报》E62，m2528 - m2529]。Cd - N和Cd - O键长范围为2.265(3)至2.333(3) Å；还存在一个弱的Cd - O相互作用，原子间距离为2.658(4) Å。具有扭曲五角双锥几何构型的Cd(II)离子由吡嗪 - 2,3 - 二羧酸根配体桥连，形成之字形链结构。这些链通过O - H⋯O氢键连接成三维骨架。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2d54/2977175/f312031942da/e-65-0m971-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2d54/2977175/f312031942da/e-65-0m971-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2d54/2977175/f312031942da/e-65-0m971-fig1.jpg

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