A novel polymeric Cd[SSe2N2] central core five-coordinate complex: Synthesis, X-ray structure and 113Cd, 77Se CP MAS NMR characterization of catena(bis(μ2-selenocyanato-N,Se)-(N,N′-dimethylimidazolidine- 2-thione-S)-cadmium(II))

Cadmium(II) selenocyanate reacts with N,N′-dimethylimidazolidine-2-thione (Me2Imt) at a 1:1 ratio forming a polymeric [(Me2Imt)Cd(SeCN)2]∞ complex. The metal ion is bonded to one imidazolidine thione through the sulfur atom, two selenocyanate ions through their selenium atoms and two other selenocyanates through their nitrogen atoms. The metal complex coordination sphere Cd[SSe2N2] adopts a distorted trigonal bipyramidal geometry with the chalcogen atoms occupying the equatorial positions and the nitrogen atoms in the axial positions. The 77Se CP MAS NMR data are consistent with two different selenium sites and the shielding tensor parameters of 113Cd point to a near axial symmetry for the cadmium environment.