Aquadiisothiocyanato(N,N,N',N'‐tetramethylethylenediamine‐N,N')copper(II)

The crystal structure of [Cu(NCS) 2 (N,N,N',N'-tmen)(H 2 O)] (N,N,N',N'-tmen is N,N,N',N'-tetramethylethylenediamine, C 6 H 16 N 2 ) consists of discrete non-centrosymmetric molecules connected by a network of O-H...S hydrogen bonds. The coordination polyhedron around the Cu II atom is square pyramidal, with the Cu atom about 0.22 A above the plane of the four N atoms. The Cu-N basal-plane bond length has a mean value of 1.9999 A. The fifth (apical) position is occupied by the O atom of the water molecule [Cu-O 2.342 (3) A]. The N,N,N',N'-tetramethylethylenediamine chelate ring displays an unsymmetrical 'gauche' configuration.