Add time:07/24/2019 Source:sciencedirect.com
Raman spectra of 2,4,4-trimethyl-2-pentanethiol were measured. The spectral analysis with the normal coordinate treatment indicated that this molecule takes the gauche conformation about the CCCS bond in the solid state and the trans and gauche conformations in the liquid state. The Raman bands due to the totally symmetric C&.zdbnd;C streching vibration of the t-butyl part of the 1,1,3,3-tetramethylbutyl group were found to be important to distinguish the two conformations. These key bands were applied to the interpretation of the Raman spectra of Triton X-100 surfactant which contains the p-(1,1,3,3-tetramethylbutyl)phenoxyl group as a hydrophobic moiety. The 1,1,3,3-tetramethylbutyl group of Triton X-100 molecules is shown to be predominantly in the gauche conformation in the liquid state and in aquaeous solution.
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