Bis(picolinato-κ2N,O)bis(urea-κO)nickel(II) urea disolvate monohydrate
First published: 14 May 2004
Guo-Cong Guo, e-mail: [email protected]
Abstract
A new compound, [Ni(pic)2{CO(NH2)2}2]·2[CO(NH2)2]·H2O (Hpic is picolinic acid) or [Ni(C6H4NO2)2(CH4N2O)2]·2CH4N2O·H2O, has been synthesized and structurally characterized by single-crystal X-ray diffraction analysis. The structure shows that the Ni atom has an octahedral environment in which it is coordinated by two N and two O atoms of two picolinate ligands and two O atoms of two urea molecules. The Ni atom lies at an inversion center, with Ni—N = 2.0531 (18) Å, Ni—O(pic) = 2.0349 (15) Å and Ni—O(urea) = 2.1255 (15) Å. Both urea solvent molecules lie on mirror planes and have approximate C2v symmetry, and the water molecule has exact mirror symmetry. π–π stacking and hydrogen-bonding interactions result in a three-dimensional network.
