15min:
VIBRATIONAL SPECTRA AND ASSIGNMENTS OF FUNDAMENTALS OF 1,1-DIFLUOROCYCLOPROPANE AND ITS d 2 AND d 4 ISOTOPOMERS.

NORMAN C. CRAIG, Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH 44074; DONALD C. MCKEAN, School of Chemistry, University of Edinburgh, EH9 3JJ, U. K..

Infrared and Raman spectra of 1,1-difluorocyclopropane (DFCP) and its 2,2- d 2 and d 4 isotopomers have been recorded. Included are gas-phase Raman spectra obtained with an FT instrument and a simplified sample arrangement. A full vibrational assignment has been proposed for the three isotopomers, and normal coordinate calculations have been done in preparation for determining an equilibrium structure for this ring system. A microwave investigation provides the needed rotational constants for a full set of isotopomers of DFCP.