Acta Cryst. (2004). E60, m571-m573  [ doi:10.1107/S1600536804008487 ]

Bis(picolinato-²N,O)bis(urea-O)nickel(II) urea disolvate monohydrate

A-Q. Wu, G.-H. Guo, F.-K. Zheng, G.-C. Guo and J.-S. Huang

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 C_2v symmetry, and the water molecule has exact mirror symmetry. - stacking and hydrogen-bonding interactions result in a three-dimensional network.

Online 17 April 2004

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