title: Bis(2,2'-bipyridine-κN,N')(croconato-κO,O')nickel(II).
abstract: The title compound, [Ni(C(5)O(5))(C(10)H(8)N(2))(2)], lies across a crystallographic twofold axis, around which two 2,2'-bipyridine (2,2'-bipy) ligands are arranged in a propeller manner. The local geometry of the NiN(4)O(2) coordination core basically adopts an octa-hedral geometry. The mol-ecular twofold axis is along the direction of the mol-ecular dipole moment, and the complex is packed with its dipole moment alternately along the +b and -b directions. The crystal structure is stabilized by inter-molecular C-H⋯O hydrogen bonds.
authors.affiliation: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong Province, People's Republic of China.
authors.forename: Hong-Feng
authors.initials: HF
authors.lastname: Chen
authors.forename: Qi
authors.initials: Q
authors.lastname: Fang
authors.forename: Wen-Tao
authors.initials: WT
authors.lastname: Yu