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Preparation and Molecular Structure of Binuclear Nickel (I) Complex Bridged by 1,2,4, 5‐Benzenetetracarboxylato Tetravalent Anion
Author(s) -
Cheng YaQian,
Lin WenJiao,
Hu MaoLin,
Yuan JiXin,
Wang Shun,
Wang JiaGuo
Publication year - 2001
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20010190322
Subject(s) - chemistry , octahedron , monoclinic crystal system , crystallography , nickel , crystal structure , imidazole , denticity , carboxylate , molecule , ion , stereochemistry , organic chemistry
The title complex [(H 2 O) 2 (IMI) 3 Ni(TCB)Ni(IMI) 3 ‐(H 2 O) 2 ] H 2 O (TCB = 1,2,4,5‐benzenetetracarboxylato te‐travalent anion; IMI = imidazole) has been prepared by the reaction of Ni(IMI) 3 (Ac) 2 and TCB in aqueous solution. The crystal structure has been determined by single‐crystal X‐ray diffraction method. It crystallizes in the monoclinic system, space group P 2 1 /c (# 14), a = 1.2714(4) nm, b = 0.9411 (3) nm, c = 1.5869(4) nm, β= 108.54(2)°, V= 1.8001(9) nm 3 , Z = 2. The main feature of the crystal structure is a symmetric binuclear unit made up of two slightly distorted coordination octahedrons, which are bridged by TCB in monodentate fashion to each metal ion. Moreover three nitrogen atoms from three imidazoles, three oxygen atoms from two water molecules and one carboxylate group of TCB coordinated to a nickel (I) ion are found on a face of the octahedron respectively, so the octahedron is a facial isomer.