Cadmium polysulfide complexes, [Cd(Sx)(Sy)]2-: syntheses, crystal and molecular structures, and cadmium-113 NMR studies

摘要: Controlled methods for the formation of cadmium polysulfide complexes in nonaqueous solution, mainly dimethylformamide (DMF), have been developed. The preferred method is CdS + Na{sub 2}S S{sub 8} DMF, which allows a wide range solution compositional variables Cd{sup 2+} n(S{sub m}){sup 2{minus}} to be attained. {sup 113}Cd NMR spectroscopy reveals existence series monocadmium (Cd(S{sub x}){sub 2}){sup 2{minus}}, are slow exchange ( 3{sigma}(I)), R = 0.055; 7, space group P{bar 1}, 11.913 (5) {angstrom}, b 12.010 c 19.785 (8) {alpha} 92.01 (3){degree}, {beta} 93.05 {gamma} 111.65 (2){degree}, V 2623 (2) {angstrom}{sup 3}, 5211 observed reflections (Mo K{alpha}, I > 0.054. 43 refs., 7 figs., 9 tabs.« less