DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
FLUORINE NMR SPECTRA AND CONFORMATIONAL ISOMERIZATION OF 1,1-DIFLUOROCYCLOHEXANE.
ILLINOIS UNIV AT URBANA WILLIAM A NOYES LAB
Pagination or Media Count:
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
APPROVED FOR PUBLIC RELEASE