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)NMRspectroscopy in the solid state in a temperature range from 295 to 378K.~31p NMR signals for the terminal and bridging ligands of the complexes were differentated.The experimental NMR spectra show~31P-~111,113 Cd and ~113Cd-~31P spin-spin couplings only for the terminal ligands.The chemical shift anisotropy delta_aniso and the asymmetry parameter eta were calculated for ~31P and ~113Cd NMR signals.It was found that the ~31P chemical shifts for the terminal and bridging dithiophophato groups differ in anisotropy character.