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Rotational isomers of methyl trans-cinnamate: A Raman study

✍ Scribed by M. Dulce G. Faria; J. J. C. Teixeira-Dias; R. Fausto

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
438 KB
Volume
22
Category
Article
ISSN
0377-0486

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✦ Synopsis

Abstract

The Raman and infrared spectra of methyl trans‐cinnamate were measured as a function of temperature in the liquid and solid phases. The temperature dependence of the band intensities established the presence of two conformers in the liquid phase (the s‐cis and s‐trans forms, with Cο£ΎCο£ΏCο£ΎO dihedral angles equal to 0Β° and 180Β°, respectively; Ξ”__H__~(s‐trans)‐(s‐cis)~ = 3.43 Β± 0.84 kJ mol^βˆ’1^) and led to the conclusion that the thermodynamically most stable s‐cis form is the only form present in the solid.

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