Crystal and molecular structure of bis[(aci-nitromethyl)benzenato]-(NNN′N′-tetramethyl-1,2-diaminoethane)nickel(II)

Abstract

Crystals of the title compound are monoclinic, space group I2^I with a= 12.223(10), b= 7.871(10),c= 21.954-(20)Å; β= 90.21 (10)°,Z= 4. The structure was determined by the heavy-atom method by use of the intensities of 1 368 independent reflections collected by counter methods, and refined by full-matrix least-squares techniques to R 0.045. The nickel atom is in a six-co-ordinate environment of crystallographic C₂ symmetry. It is bonded to the two nitrogen atoms of the diaminoethane ligand [2.114(4)Å] and to two chelating (aci-nitromethyl)benzenato-ions [each having Ni–O 2.085(3) and 2.093(3)Å].