R. Bocquet

The rotational constants of methyl lodide

Abstract The rotational spectra of CH 3 l ( v = 0; v 3 = 1; v 3 = 2; v 6 = 1), 13 CH 3 l ( v = 0), and CD 3 l ( v = 0) were observed in the submillimeter-wave region. These data have been combined with the microwave and millimeter-wave measurements to determine with high accuracy the rotational and centrifugal distortion constants. An overall fit including rotational data and infrared laser measurements yields a set of molecular parameters for the ν 6 band of CH 3 l.

Rotational spectrum and equilibrium structure of cyanogen bromide

Abstract The rotational spectrum of BrCN has been measured in the millimeter-wave and submillimeter-wave ranges; r 0 , r s , r ϵ , I , r ρ m , and r e structures have been calculated and compared. The value of the r e (Cue5fcN) bond length is discussed and compared with those of similar molecules.

The Ground-State Rotational Constants of Methyl Bromide

The rotational spectra of CH3 79Br and CH3 81Br in their vibrational ground states have been measured up to 800 GHz. The derived constants have been introduced into a merged least-squares fit together with the constants obtained from a fit of infra-red ground-state combination differences. Accurate sextic centrifugal distortion constants have been obtained.

The submillimeterwave rotational spectra of CH3CN and CD3CN. Analysis of the v8 = 1 and v8 = 2 excited vibrational states

Abstract The rotational spectra of CH 3 CN and CD 3 CN in the degenerate excited states v 8 = 1 and v 8 = 2 were measured up to 1400 GHz with a FIR sideband laser spectrometer. These new data have been used to improve notably the accuracy of the rotational, centrifugal distortion, and vibration-rotation interaction constants. A significant dependence of the constants B and D J on the 1 quantum number was found. It is likely due to the flexibility of the CCN skeleton.