摘要:
The microwave spectrum of the symmetric tops, CF3C≡C–CH3 and CF3C≡C–CD3, has been investigated. Excited vibrational state transitions were observed, but the l-type doublet fine structure was not resolvable. Since lines originating from species containing C13 in natural abundance were identified, only two assumptions were necessary in order to determine the 7 structural parameters. The parameters giving the best fit with the experimental data are: d(C,F) = 1.340, d(C(1), C(2)) = 1.455 = d(C(3), C(4)), d(C(2), C(3)) = 1.189, and d(C,H) = 1.097 A and the angles ∠F–C–F = 106°08′ and ∠H–C–H = 108°30′.