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Conformational study of phosphoserine in aqueous solutions. II— 1 H n.m.r. results
Author(s) -
Pogliani L.,
Ziessow D.,
Krüger Ch.
Publication year - 1977
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270100108
Subject(s) - vicinal , conformational isomerism , phosphoserine , chemistry , aqueous solution , crystallography , population , coupling constant , stereochemistry , molecule , physics , serine , organic chemistry , demography , sociology , enzyme , particle physics
The 270 MHz n.m.r. spectra of phosphoserine (PSer) have been measured and completely analysed for seven pD values. The resulting vicinal coupling constants 3 J (HαHβ) and 3 J (PHβ) are used to discuss the conformations of PSer with respect to the (Hα)CαCβ(O) and (Cα)CβO(P) bond axes. The all‐ trans conformer predominates for all pD values, with its fractional population being minimal at pD values close to neutrality. The CβO bond rotamer populations agree reasonably well with those obtained from 13 C investigations.