High Resolution Infrared Spectroscopy of 2-Fluorethanol in a Molecular Beam
Abstract
The high resolution infrared spectrum of 2-fluoroethanol (2FE) in a molecular beam was obtained in the region of 2990-2977/cm. This spectral region contains the asymmetric CH stretch of the fluorinated carbon. Excitation of the CH stretch has previously been observed to photochemically isomerize 2FE from the Gg ' to the Tt conformation. The high resolution spectrum of this transition provides the information necessary to quantitatively evaluate the amount of vibrational mode-coupling between the asymmetric CH stretch and the torsional reactive coordinate. Minimal amounts of vibrational mode-coupling was observed in the spectrum which is consistent with the slow photoisomerization rate. The correlation of the amount of mode coupling and the isomerization rate supports the conclusion that mode selective vibrational coupling plays an important role in the photochemical dynamics. It is further suggested that the strong intramolecular attractive interactions limit the magnitude of the vibrational mode coupling.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 29, 1991
- Accession Number
- ADA236149
Entities
People
- Christopher L. Brummel
- Laura A. Philips
- Steven W. Mork
Organizations
- Cornell University Department of Chemistry and Chemical Biology