Velocity modulation infrared laser spectroscopy of negative ions: The ν3, ν311, ν322, and ν3+2ν 2-2ν2 bands of cyanate (NCO-)

Martin Gruebele, Mark Polak, Richard J. Saykally

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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.

Original languageEnglish (US)
Pages (from-to)6631-6636
Number of pages6
JournalThe Journal of Chemical Physics
Issue number12
StatePublished - 1986
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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