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The First Hexa‐coordinated Tetranuclear Nickel Complex {[Ni(en) 2 ] 4 [H 4 L]}(ClO 4 ) 4 ·7H 2 O with Tetrakis‐bidentate Oxamato Bridge
Author(s) -
Liang Mao,
Zhu LiNa,
Liu ShiXiong,
Liao DaiZheng,
Jiang ZongHui,
Yan ShiPing,
Cheng Peng
Publication year - 2004
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400193
Subject(s) - nickel , crystallography , tetragonal crystal system , octahedron , chemistry , magnetic susceptibility , molecule , crystal structure , organic chemistry
Abstract The first tetranuclear nickel complex with the oxamato ligand, {[Ni(en) 2 ] 4 [H 4 L]}(ClO 4 ) 4 ·7H 2 O ( 1 ) (L = N , N ′, N ″, N ‴‐methanetetrayltetrakismethylenetetrakis (oxamato)), has been prepared and determined by single‐crystal X‐ray analysis. 1 crystallizes in the tetragonal space group I 4 1 /a, with a = 15.2744(9), c = 31.3748(2) Å and Z = 4. Each nickel (II) ion is in a distorted octahedral donor atom environment, which comprises four nitrogen atoms of two en molecules and two oxygen atoms of oxamato bridge. The shape of the entity looks like a propeller. The temperature‐dependent magnetic susceptibilities were analyzed by the Curie‐Weiss law; the following values were found C = 4.36 cm 3 K mol ‐1 , θ = ‐24.7 K, respectively.