Abstract
The preparations are described of compounds containing the complex anions M( iYCSe)e4and M( KCSe)d2-, where M = Mn, Fe, Co, and Ni, and of [ ( C ~ H ~ ) ~ S ] Z Z ~ ( S C S ~ ) ~ . The results of studies of their electronic and infrarcd spectra, magnetic properties, and X-ray powder photographs are reported. The anions M(NCSe)d2-, where M = Mn, Fe, Co, and Zn, arc tetrahedral, but the nickel ion in (cat2+)Ni( NCSe)li is in a six-coordinate, tetragonal ligand field achieved by anion association, with bridging SCSe groups. The low-energy infrared spectra of the complexes have bands assignable as essentially metal-ligand stretching vibrations a t 233-261 for M( NCSe)d2and a t 195-237 cm.-l for M( NCSe)e4-. The complcx [(CH3)4hT]2Pd(SeCr';)4 has been prepared and its infrared spectrum (2500-200 cm. -I) is reported.
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