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A 31 P NMR study of O,O′ ‐dialkyldithiophosphates: An unusual coupling
Author(s) -
Ray G. Joseph,
Caspari Gunter
Publication year - 1987
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260251102
Subject(s) - chemistry , alkyl , alkane , j coupling , coupling (piping) , stereochemistry , crystallography , nuclear magnetic resonance spectroscopy , organic chemistry , hydrocarbon , mechanical engineering , engineering
A series of O,O′ ‐dialkyldithiophosphoric acids have been studied by 31 P NMR, and a four‐bond 31 P‐ 1 H 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 any conformational preference. Variation of the structural features of the alkyl group showed that this coupling involved a “W” pathway.