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Raman spectra and normal vibrations of dipeptides. II. Glycyl‐ L ‐proline
Author(s) -
Lagant P.,
LoucheuxLefebvre M. H.,
Huvenne J. P.,
Vergoten G.,
Fleury G.,
Legrand P.
Publication year - 1983
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.360220504
Subject(s) - chemistry , raman spectroscopy , dipeptide , proline , normal mode , tetrahedron , stereochemistry , spectral line , ring (chemistry) , crystallography , nuclear magnetic resonance , vibration , computational chemistry , peptide , organic chemistry , amino acid , biochemistry , optics , physics , quantum mechanics , astronomy
Raman and ir spectra of the glycyl‐ L ‐proline (GP) dipeptide were recorded. A normal‐coordinate treatment was performed on the basis of the experimental spectra, using a modified Urey‐Bradley force field (MUBFF). Cyclic redundancies were eliminated, and those due to the ring methylene groups, particularly distorted in regard to the tetrahedral conformation, were treated. An assignment of the experimental frequencies is proposed on the basis of the normal treatment.