Infrared spectroscopic studies of solvent effects on the conformation of n-alkanes

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1139/v86-254
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  1. National Research Council Canada
FormatText
TypeArticle
Journal titleCanadian Journal of Chemistry
ISSN0008-4042
1480-3291
Volume64
Issue8
Pages1544–1547
Abstract
The infrared spectra of specifically deuterated n-tridecane-7,7-d₂ pure and mixed with several linear and branched hydrocarbons have been measured as a function of temperature. The average gauche fraction at the middle of the n-tridecane chain has been determined from the intensities of conformation-specific CD₂ rocking bands. The results indicate that the concentration of gauche rotamers in the centre of the n-C₁₃ chains varies with the solvent. For example, when n-tridecane is dissolved in other n-hydrocarbons the gauche concentration decreases when the chain length of the solvent is shorter than n-C₁₃ and increases when the solvent chains are longer than n-C₁₃. However, no simple, direct correlation is found between these solvent-induced changes in gauche concentration and measured thermodynamic quantities of mixing.
Publication date
LanguageEnglish
Peer reviewedYes
NPARC number23001392
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Record created2017-02-01
Record modified2017-02-01
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