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The crystal and molecular structures of two homoleptic morpholine-derived dithiocarbamates of zinc, binuclear {Zn[S 2 CN(CH 2 CH 2 ) 2 O) 2 ] 2 } 2  ( 1 ), and cadmium, one-dimensional coordination polymer {Cd[S 2 CN(CH 2 CH 2 ) 2 O) 2 ] 2 } 2  ( 2 ), are described. In  1 , a centrosymmetric binuclear molecule is found as there are equal numbers of chelating and bidentate bridging dithiocarbamate ligands; weak transannular Zn···S interactions are found within the resultant eight-membered {···SCSZn} 2  ring which has the form of a chair. The resultant 4+1 S 5  donor set is highly distorted with the geometry tending towards a square-pyramid. By contrast, a square-planar geometry is found in centrosymmetric  2  defined by symmetrically chelating dithiocarbamate ligands. The presence of Cd···S secondary bonding in the crystal of  2  leads to a distorted 4+2 S 6  octahedron and a linear coordination polymer, which is unprecedented in the structural chemistry of cadmium dithiocarbamates. The analyses of the Hirshfeld surfaces for  1  and  2  show the dominance of H···H, S···H/H···S and O···H/H···O contacts to the surface, i.e. contributing around 90 and 80%, respectively.

zeitschrift für kristallographie - crystalline materials 

A new structural motif for cadmium dithiocarbamates: crystal structures and Hirshfeld surface analyses of homoleptic zinc and cadmium morpholine dithiocarbamates