Similar structural feature observed in the crystal packing of [Ni(dmit)2] salts of geometrical isomer of methoxycarbonyl pyridinium
作者:Kazuaki Tomono、Kazumi Ogawa、Yuka Sasaki、Kazuo Miyamura
DOI:10.1016/j.ica.2007.07.021
日期:2008.1
The crystal structures of the C-H center dot center dot center dot O hydrogen-bonded, 1:1 complex salts of with [Ni(dmit)(2)](-) 2MMP, 3MMP and 4MMP (ortho-, meta-, and para-methoxycarbonyl N-methyl-pyridinium, respectively) cations with have been investigated. All complex salts formed non-segregated stacks with the anions being sandwiched between layers or dimers of cations. Within these salts, the arrangement of the counter cations are structurally modulated by two weak intermolecular hydrogen bonds between the hydrogen of the pyridinium ring, methyl group or one of the two and the C=O group of the cations. The alignment of Ni(dmit)(2) molecules is found to be mainly governed by the attached position of methoxycarbonyl group. Powders of (2MMP)[Ni(dmit)(2)], (3MMP)[Ni(dmit)(2)] and (4MMP)[Ni(dmit)(2)] salts exhibited room temperature conductivities of 4.33 x 10(-10), 1.80 x 10(-6) and 5.60 x 10(-6) S cm(-1), respectively. (c) 2007 Elsevier B.V. All rights reserved.