Heteroorganic betaines 1. Synthesis of betaines containing the +P-C-Si-S- and +P-C-C-S- fragments and their characterization by multinuclear NMR spectroscopy

Article abstract of DOI:10.1007/BF02494719

A method for the synthesis of a new class of betaines, viz., R¹3P⁺CR²R³SiR⁴S^-, was developed. The experimental evidence for the intermediate formation of betaines R¹3P⁺-CR²R³-CR⁴R⁵-S^- in the Wittig reaction for a series of thiocarbonyl compounds was obtained. A comparative analysis of the NMR spectra of betaines containing the ⁺P-C-Si-S^- and ⁺P-C-C-S^- fragments was performed.