Bis(di-2-pyridylmethane-diol-3 N,O,N′)nickel(II) dinitrate

Abstract

The title compound, [Ni(C11H10N2O 2)2](NO3)2,consists of an Ni II atom coordinated by two tridentate chelating di-2-pyridylmethane- diol [(2py)2C(OH)2] ligands. The NiII atom is located on an inversion center. The geometry around the NiII atom is distorted octa-hedral. The gem-diol (2-py)2C(OH)2 ligand adopts the coordination mode 1:1:1. The Ni - N and Ni - O bond lengths are typical for high-spin NiII in an octa-hedral environment [Ni - N = 2.094 (2) and 2.124 (3) Å, and Ni - O = 2.108 (3) Å]. One of the hydr-oxy H atoms is split over two positions which both inter-act with the nitrate anion. The occurence of different O - H⋯O hydrogen bonds leads to the formation of a layer parallel to the (101) plane.