Infrared Laser Spectroscopy of Jet-Cooled C2F6 near 10 &mu;m
The nu5 (A2u) and nu7 (Eu) C-F stretching fundamentals of hexafluoroethane, C2F6, have been recorded in a supersonic jet by diode laser absorption spectroscopy. The parallel 5(1)o band is accompanied by five satellite bands, of which three have been assigned to hot bands. A fourth satellite band arises from 12CF313CF3. Transitions satisfying 0 </= KDeltaK </= 7 of the perpendicular 7(1)o band are unperturbed while those having -10 </= KDeltaK </= 7 can be fitted assuming an Rz-Coriolis interaction with a state lying at nup = 1256 cm-1. A second localized perturbation affects lines with KDeltaK >/= 8. The band origins are 1117.10736 (7) cm-1 (5(1)o) and 1252.96950 (17) cm-1 (7(1)o, 0 </= KDeltaK </= 7), and the rotational constant B0 = 0.0615759 (27) cm-1.
Hansford
GM
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
Davies
PB