title: trans-Bis(5-carb-oxy-2-methyl-1H-imidazole-4-carboxyl-ato-κN,O)copper(II).
abstract: In the title compound, [Cu(C(6)H(5)N(2)O(4))(2)], the copper(II) atom lies on an inversion centre and is in an N(2)O(2) four-coordinate environment with a nearly regular square-planar geometry. An extended network of intra-molecular O-H⋯O and inter-molecular N-H⋯O and C-H⋯O hydrogen bonds stabil-izes the crystal structure.
authors.affiliation: Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences, and Peking Union Medical College, Beijing 100050, People's Republic of China.
authors.forename: Xin
authors.initials: X
authors.lastname: Guo
authors.forename: Yi Liang
authors.initials: YL
authors.lastname: Li
authors.forename: Ju Xian
authors.initials: JX
authors.lastname: Wang
authors.forename: Yu Cheng
authors.initials: YC
authors.lastname: Wang