Solid state 31P and 207Pb MAS NMR studies on polycrystalline O, O′-dialkyldithiophosphate lead(II) complexes

Abstract

A number of lead(II) O, O′-dialkyldithiophosphate complexes were studied by 13C, 31P, and 207Pb MAS NMR. Simulations of 31P chemical shift anisotropy using spinning sideband analysis reveal a linear relationship between the S P S bond angle and the principal values δ 22 and δ 33 of the 31P chemical shift tensor. The 31P CSA data were used to assign ligands with different structural functions. In the cases of diethyldithiophosphate and di- iso-butyldithiophosphate lead(II) complexes, 2 J ( 31P, 207Pb)-couplings were resolved and used to confirm the suggested assignment of the ligands. The SIMPSON computer program was used to calculate 31P and 207Pb spectral sideband patterns.