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13 C, 31 P and 1 H NMR studies of chiral bis[(4 R ,6 R )‐4,6‐dimethyl‐1, 3, 2‐dioxaphosphorinan‐2‐yloxy]alkane derivatives. Coupling between phosphorus atoms six bonds apart
Author(s) -
Szalontai G.,
Bakos J.,
Tóth I.,
Heil B.
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.1260250905
Subject(s) - chemistry , alkane , coupling (piping) , nmr spectra database , crystallography , carbon 13 nmr , j coupling , nuclear magnetic resonance spectroscopy , phosphorus , spectral line , carbon 13 nmr satellite , stereochemistry , organic chemistry , fluorine 19 nmr , hydrocarbon , physics , astronomy , mechanical engineering , engineering
13 C, 1 H and 31 P NMR investigations were carried out to confirm the stereochemistry of novel bis[(4 R ,6 R )‐4,6‐dimethyl‐1,3,2‐dioxaphosphorinan‐2‐yloxy]alkanes. The 13 C NMR spectra exhibited second‐order features at room temperature. Substantial coupling was found between P atoms six bonds apart. The possibility of a through‐space contribution was tested. Spatially close P atoms and the strongly electronegative P substituents (oxygen atoms) are thought to be responsible for the enhanced P… P coupling.