title: cis-[(7R,14R)-5,5,7,12,12,14-Hexa-methyl-1,4,8,11-tetra-azacyclo-tetra-decane-κN](oxalato-κO,O')nickel(II) oxalic acid solvate.
abstract: Both mol-ecules of the title compound, [Ni(C(2)O(4))(C(16)H(36)N(4))]·C(2)H(2)O(4), are located on a crystallographic twofold rotation axis. The Ni(II) atom shows a distorted octa-hedral geometry. The crystal packing is stabilized by N-H⋯O and O-H⋯O hydrogen bonds.
authors.affiliation: Department of Biology and Chemistry, Hunan University of Science and Engineering, Yongzhou Hunan 425100, People's Republic of China.
authors.forename: Guang-Chuan
authors.initials: GC
authors.lastname: Ou
authors.forename: Yong-Qiang
authors.initials: YQ
authors.lastname: Dai
authors.forename: Man-Sheng
authors.initials: MS
authors.lastname: Tang