Binuclear Cadmium Dithiophosphate Crystals:~13C,~31P,and~113Cd CP/MAS NMR Studies

摘要

Binuclear diisopropyl and dicyclohexyl dithiophosphate cadmium complexes,namely,[Cd_2{S_2P(OR)_2}_4],were studied by high-resolution heteronuclear(~13C,~31P,and~113Cd)NMR spectroscopy in the solid state in a temperature range from 295 to 378 K.~31P NMR signals for the terminal and bridging ligands of the complexes were differentiated.The experimental NMR spectra show~31P-~111,113Cd and~113Cd-~31P spin-spin couplings only for the terminal ligands.The chemical shift anisotropy sigma_aniso and the asymmetry parameter eta were calculated for~31P and~113Cd NMR signals.It was found that the P chemical shifts for the terminal and bridging dithiophosphato groups differ in anisotropy character.