Overtone spectra of 2-mercaptoethanol and 1,2-ethanedithiol.
Vibrational spectra of vapor-phase 1,2-ethanedithiol and 2-mercaptoethanol were recorded to investigate weak intramolecular interactions. The spectra were recorded with conventional absorption spectroscopy and laser photoacoustic spectroscopy in the 2000-11,000 cm(-1) region. The room temperature spectra of each molecule are complicated by contributions from several conformers. Anharmonic oscillator local-mode calculations of the OH- and SH-stretching transitions have been performed to facilitate assignment of the different conformers in the spectra. We observe evidence of hydrogen-bond-like interactions from OH to S, but not from SH to O or S. The OH to S intramolecular interaction in 2-mercaptoethanol is weak and comparable to that found in the OH to O interaction in ethylene glycol.
Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand.
Benjamin J
BJ
Miller
Mivsam
M
Yekutiel
A Helena
AH
Sodergren
Daryl L
DL
Howard
Meghan E
ME
Dunn
Veronica
V
Vaida
Henrik G
HG
Kjaergaard
D019855:Ethylene Glycol / Q000737:chemistry; D006860:Hydrogen Bonding; D008623:Mercaptoethanol / Q000031:analogs & derivatives* / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D014732:Vibration; D014835:Volatilization
D008623:Mercaptoethanol; C031854:1,2-ethanedithiol; D019855:Ethylene Glycol