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 : 05 Jan 1965


Pagination or Media Count : 17


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)


Descriptors :   MOLECULAR ISOMERISM , MOLECULAR STRUCTURE


Distribution Statement : APPROVED FOR PUBLIC RELEASE