Structural investigations of metal–nitrate complexes. Part IV. Crystal and molecular structure of bisaquonitratobispyridinenickel(II), [Ni(C5H5N)2(NO3)2(H2O)2]

Abstract

The structure of the title compound has been determined by three-dimensional X-ray analysis from diffractometer data. The crystals are monoclinic, space-group P2₁/c, with Z= 2 in a unit cell of dimensions : a= 8·787, b= 11·725, c= 7·548 Å, β= 106·94°. The structure was solved by the heavy-atom method and refined by least-squares calculations to a final R of 0·044 for 1849 independent reflections. The molecule is a centrosymmetric, six-co-ordinate monomer; the high stability and ease of formation of the crystalline compound may be related to a complex system of intermolecular hydrogen bonding.