The Open Crystallography Journal

2011, 4 : 21-24
Published online 2011 March 10. DOI: 10.2174/1874846501104010021
Publisher ID: TOCRYJ-4-21

Novel Thermally-Accessible Structural Distortion and Lattice Strain of a Chiral Cyanide-Bridged Cu (II)-Ni (II) Complex

Takashiro Akitsu , Yuki Endo Yusuke Kimoto and Mao Ohwa
Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjukuku, Tokyo 162-8601, Japan.

ABSTRACT

We have investigated temperature dependence of crystal structure of a chiral cyanide-bridged bimetallic assembly of [CuL2][Ni(CN)4]·2H2O (1) (L = (1R, 2R)-diaminocyclohexane). Cell parameters and most of bond distances decreased on cooling for 1. However, only a long Cu-N bond of semi-coordination increases on cooling, which is the first example of negative thermal elongation of specific bond distances.