J = 2→3, 3→4, 4→5, and 5→6 transitions in the oblate symmetric top molecule cobalt tricarbonyl nitrosyl were measured using a Flygare-Balle type pulsed beam microwave spectrometer. K = 0 and K = 3 transitions were observed for J = 3→4 and 4→5. Hyperfine structure due to 59Co and 14N nuclear quadrupole coupling interactions was well resolved. The measured quadrupole coupling strengths are eQq cc. (59Co) = 35.14(30) MHz and eQqcc ( 14N) = -1.59(10). Measured rotation and distortion constants are B0 = 1042.1590(4) MHz and Dj = 0.17(8) kHz. The measured B value is 4% smaller than the B value calculated from electron diffraction data. Spin-rotation and a quadrupole distortion term were also obtained for 59Co.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry