A 31P NMR Study of O,O'-Dialkyldithiophosphates: An Unusual Coupling

Article abstract of DOI:10.1002/mrc.1260251102

A series of O,O'-dialkyldithiophosphoric acids have been studied by 31P NMR, and a four-bond 31P-1H scalar coupling has been detected.This coupling is unusual because it is observed between phosphorus and only one of two available protons located on the same carbon, even when the alkyl fragment is simply an alkane that should not show conformational preference.Variation of the structural features of alkyl group showed that this coupling involved a "W" pathway. KEY WORDS - 31P NMR O,O'-dialkyldithiophosphoric acids four-bond 31P, 1H coupling