# VELOCITY MODULATION INFRARED LASER SPECTROSCOPY OF NEGATIVE IONS: THE $\nu_{3}, \nu_{3}+v_{1}-\nu_{1}, \nu_{3}+\nu_{2}-\nu_{2}$ AND $\nu_{3}+2\nu_{2}-2\nu_{2}$ BANDS OF CYANATE ($NCO^{-}$)

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 Title: VELOCITY MODULATION INFRARED LASER SPECTROSCOPY OF NEGATIVE IONS: THE $\nu_{3}, \nu_{3}+v_{1}-\nu_{1}, \nu_{3}+\nu_{2}-\nu_{2}$ AND $\nu_{3}+2\nu_{2}-2\nu_{2}$ BANDS OF CYANATE ($NCO^{-}$) Creators: Gruebele, M.; Polak, M.; Saykally, R. J. Issue Date: 1987 Publisher: Ohio State University Abstract: 132 transitions in the $\nu_{3}$ (CN stretching) fundamental and the corresponding bending and stretching hotbands of the cyanate anion, ranging from P(52) to R(66), have been measured 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 $(00^{0}0), (01^{1}0), (02^{0}0), (10^{0}0), (00^{0}1), (01^{1}1), (02^{0}1)$ and $(10^{0}1)$ states. The equilibrium rotational constant was determined to be $B_{e} = 0.385933(116) cm^{-1}$. A comparison with condensed phase results is presented. As previously observed for $N_{3}^{-}$, cyanate is detected with high vibrational excitation in the bending mode, most likely as a consequence of the formation mechanism. Description: Author Institution: Department of Chemistry, University of California URI: http://hdl.handle.net/1811/17184 Other Identifiers: 1987-ME-11