Accession Number:

AD0457508

Title:

FLUORINE NMR SPECTRA AND CONFORMATIONAL ISOMERIZATION OF 1,1-DIFLUOROCYCLOHEXANE.

Descriptive Note:

Technical rept.,

Corporate Author:

ILLINOIS UNIV AT URBANA WILLIAM A NOYES LAB

Personal Author(s):

• Jonas, J.
• Allerhand, Adam

Report Date:

1965-01-05

Pagination or Media Count:

17.0

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 11 vv 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

Descriptors:

• MOLECULAR ISOMERISM
• MOLECULAR STRUCTURE

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE