FLUORINE NMR SPECTRA AND CONFORMATIONAL ISOMERIZATION OF 1,1-DIFLUOROCYCLOHEXANE.
Abstract
The F-19 high resolution spectrum of 1,1-difluorocyclohexane was observed at temperatures from -93 to +40 C. The rate of conformational isomerization as determined by a complete line shape analysis method for temperatures from -71 to +6 C. The activation parameters were determined for 1:1 v/v solutions in CS2 and CFCl3 at the coalescence temperature of 228 K. In the low temperature spectra of the CS2 solution, the resonance of the equutoial fluorine is shifted 15.64 ppm downfield from the axial. At temperatures above -10 C, neglect of the H-F coupling in the line shape analysis produces systematic errors in the apparent exchange rate. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 05, 1965
- Accession Number
- AD0457508
Entities
People
- Adam Allerhand
- J. Jonas
Organizations
- University of Illinois Urbana–Champaign