H. Thomassen, S. Samdal, K. Hedberg
Apr 1, 1992
Citations
0
Influential Citations
13
Citations
Journal
Journal of the American Chemical Society
Abstract
The molecular structures and conformational compositions of 1,2-dibromotetrafluoroethane (DBTF) and 1,2-diiodotetrafluoroethane (DITF) have been investigated in the gas phase by electron diffraction each at three nozzle-tip temperatures; DBTF, 273, 388, and 673 K; DITF, 293, 393, and 473 K. Both molecules exist as a mixture of anti and gauche rotamers with the former the more stable. Distances (r g /A) and angles (L α /deg) for the lowest temperatures, with estimated 2σ uncertainties, are as follows: (DBTF) r(C-F)=1.340 (3), r(C-C)=1.559 (13), r(C-Br)=1.930 (5), LCCF=109.9 (4), LFCF=108.4 (8), LCCBr=110.5 (5), and LBGrCCBrG=67 (3)