Normal mode analyses of methyl palmitate all-trans and disordered forms in wagging progressive region

  • Ishioka T
  • Yan W
  • Strauss H
 et al. 
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Abstract

Normal mode analyses are made for methyl palmitate molecule having all-trans or conformational disorders around the ester head group, in order to explain characteristic observed frequency shifts in the wagging progressive region between all-trans and disorder chains in triglyceride molecules. It was found that one gauche conformation at Cα-Cβposition and 90° rotation of the ester head group in an alkyl chain produce frequency shifts for twisting mode as observed. For wagging modes, contamination of the disorders around the head group makes assignments change and apparent frequency shifts occur. © 2002 Elsevier Science B.V. All rights reserved.

Author-supplied keywords

  • Band shifts
  • Infrared spectra
  • Methyl palmitate
  • Methyleme progression
  • Normal mode analysis

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Authors

  • Tsutomu Ishioka

  • Wenhong Yan

  • Herbert L. Strauss

  • Robert G. Snyder

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