The rotational spectra of the HCCCNH+, NCCNH+, and CH3CNH+ ions
Abstract
The rotational spectra of the HCCCNH+, NCCNH+, and CH3CNH+ ions have been observed in a supersonic molecular beam by Fourier transform microwave (FTM) spectroscopy. The rotational and centrifugal distortion constants were determined for all three, and the nitrogen quadrupole hyperfine coupling constants for HCCCNH+ and NCCNH+. From the respective Doppler shifts, it is found that the velocities of the ions are 3% larger than those of the parent unprotonated molecules, and the linewidths are greater by about 50%. The concentration of the ions near the nozzle is approximately 1011 cm-3, which is sufficiently high to be detectable in the visible and the IR by present laser techniques.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- August 2000
- DOI:
- 10.1063/1.481994
- Bibcode:
- 2000JChPh.113.1910G
- Keywords:
-
- 33.20.Sn;
- 33.15.Mt;
- 33.20.Bx;
- 33.70.Jg;
- 33.25.+k;
- Rotational analysis;
- Rotation vibration and vibration-rotation constants;
- Radio-frequency and microwave spectra;
- Line and band widths shapes and shifts;
- Nuclear resonance and relaxation