Abstract
A reduced bandwidth (480 MHz) chirped-pulse Fourier-transform microwave spectrometer has been used to record the rotational spectrum of the weakly bound complex between chlorofluoromethane and fluoroethylene (CH2ClF center dot center dot center dot FHC=CH2). Spectra of both the (CI)-C-35 and (CI)-C-37 isotopologues were assigned from a 7 to 18 GHz broadband scan. Derived rotational constants ((CI)-C-35: A = 5602.82(28) MHz, B = 918.5894(4) MHz, C = 795.1888(4) MHz; (CI)-C-37: A = 5453.14(9) MHz, B = 913.6372(5) MHz, C= 788.4024(4) MHz) are consistent with a C-s symmetry structure in which the CH2ClF is angled toward the fluorine and hydrogen atoms at the end of the fluoroethylene subunit. The CH2ClF hydrogen atoms straddle the fluorine atom on fluoroethylene, while the chlorine atom from CH2ClF points towards the geminal hydrogen atom on fluoroethylene. Dipole moment components of mu(a) = 2.342(6) D, mu(b) = 0.022(7) D and = mu(tot) = 2.342(7) D were also determined. (C) 2012 Elsevier Inc. All rights reserved.