Bis(μ-N,N-diallyldithiocarbamato)bis[(N,N-diallyldithiocarbamato)cadmium]

Abstract

The title compound, [Cd 2 (C 7 H 10 NS 2 ) 4 ], is a neutral dinuclear cadmium(II) complex bearing four bis N,N-diallyldithiocarbamate ligands coordinating to two Cd II cations. In each of the monomeric subunits, there are four S atoms of two dithiocarbamate ligands [Cd-S = 2.5558 (3), 2.8016 (3), 2.6050 (3) and 2.5709 (3) Å ] that coordinate to one Cd II atom in a bidentate mode. The dimers are located over an inversion centre bridged by two additional bridging Cd-S bonds [2.6021 (3) Å ], leading to a substantial distortion of the geometry of the monomeric subunit from the expected square-planar geometry. The fivecoordinate environment around each of the Cd II ions in the dimer is best described as substantially tetragonally distorted square pyramidal. The dithiocarbamate groups are themselves planar and are also coplanar with the Cd II ions. The negative charge on these groups is delocalized by resonance across the S atoms bound to the Cd II cation. This delocalization of the electrons in the dithiocarbamate groups also extends to the C-N bonds as they reveal significant double bond character [C-N = 1.3213 (16) and 1.3333 (15) Å ].