2-THIOXO-1,3,2-DITHIAPHOSPHOLANES -SOLID-STATE MAS NMR AND CRYSTAL STRUCTURE INVESTIGATIONS AS WELL AS IGLO CALCULATIONS OF <sup>31</sup>P SHIELDING TENSORS
作者:Peggy Schwarz、Gisela Ohms、Kerstin Krüger、Gisbert Grossmann、Volker Kaiser
DOI:10.1080/10426509808033718
日期:1998.10.1
2-Thioxo-1,3,2-dithiaphospholanes with P-substituents R=Me, Et, i-Pr, t-Bu, Ph, 3,5-Me2C6H3, and 4-MeOC6H4 were prepared and characterized by solution and high resolution solid-state P-31 and C-13 NMR spectroscopy. The influence of different alkyl and aryl substituents at the phosphorus atom on the anisotropy of P-31 chemical shift and on the molecular structure is discussed. The orientation of the principal axes with respect to the molecular fro-me is predicted from the solid-state P-31 NMR results. Quantum chemical calculations of the P-31 shielding tensors by the IGLO method confirm these results. The crystal structures of 2-tert-butyl-2-thioxo-1,3,2-dithiaphospholane and 2-(3,5-dimethylphenyl)-2-thioxo-1,3,2-dithiaphospholane are presented and discussed.