title: Bis[1,1-dimethylbiguanide(1-)-kappa2N2,N5]copper(II) monohydrate.
abstract: The crystal structure of the title compound, [Cu(C(4)H(10)N(5))(2)].H(2)O, contains two independent copper N,N-dimethylbiguanide complex units, each with square-planar coordination of the Cu atom by four N atoms. The two complexes have different symmetry, with one Cu atom lying on an inversion centre and the other on a twofold rotation axis. The Cu-N bond lengths are 1.923 (2) and 1.950 (2) A in the centrosymmetric complex, and 1.928 (2) and 1.938 (2) A in the non-centrosymmetric complex. The crystal structure is stabilized by N-H...O, O-H...N and N-H...N hydrogen bonds; each water molecule forms four hydrogen bonds involving three different Cu complexes.
authors.affiliation: Institute of Molecular Science, Chemical Biology and Molecular Engineering Laboratory of Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Lu
authors.forename: Pin
authors.initials: P
authors.lastname: Yang
authors.forename: Shi-Dong
authors.initials: SD
authors.lastname: Qin
authors.forename: Miao-Li
authors.initials: ML
authors.lastname: Zhu