We have measured 132 transitions in the v3 (CN stretching) fundamental and the corresponding bending and stretching hotbands of the cyanate anion, ranging from P(52) to R(66), with a tunable diode laser using the velocity modulation technique. The spectra were fit to the standard linear triatomic molecule rotation-vibration Hamiltonian, yielding effective molecular parameters for the (0000), (0110), (0200), (1000), (0001), (0111), (0201), and (1001) states. The equilibrium rotational constant was determined to be Be=0.385 933(116) cm-1. A comparison with condensed phase results is presented. As previously oberved for N3-, cyanate is detected with high vibrational excitation in the bending mode, most likely as a consequence of the formation mechanism.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry