Bis(6'-carb-oxy-2,2'-bipyridine-6-carboxyl-ato-κN,N',O)nickel(II) tetra-hydrate

Huimin Wang; Haiquan Su; Jinjin Xu; Fenghua Bai; Ya Gao

doi:10.1107/S1600536809006515

Bis(6'-carb-oxy-2,2'-bipyridine-6-carboxyl-ato-κN,N',O)nickel(II) tetra-hydrate

Acta Crystallogr Sect E Struct Rep Online. 2009 Feb 28;65(Pt 3):m352-3. doi: 10.1107/S1600536809006515.

Authors

Huimin Wang¹, Haiquan Su, Jinjin Xu, Fenghua Bai, Ya Gao

Affiliation

¹ School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China.

Abstract

In the title compound, [Ni(C(12)H(7)N(2)O(4))(2)]·4H(2)O, the Ni atom is located at the centre of a distorted octa-hedron, formed by four N atoms and two O atoms from the same two tridentating chelated 6-carb-oxy-2,2'-bipyridine-6'-carboxyl-ate (L) ligands. Face-to-face π-stacking inter-actions between inversion-related pyridine rings with centroid-centroid distances of 3.548 (3) and 3.662 (3) Å (perpendicular distances between the respective rings are 3.314 and 3.438 Å) are found. Inter-molecular O-H⋯O hydrogen bonds between water mol-ecules and L ligands form R(5) (3)(10), R(6) (5)(14) and R(5) (5)(12) rings and also a centrosymmetric cage-like unit of water mol-ecules, which link eight adjacent Ni(II) centers, forming a three-dimensional framework.