# THE EQUILIBRIUM STRUCTURE OF PROTONATED NITROGEN DETERMINED FROM HIGH RESOLUTION INFRARED SPECTROSCOPY

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 Title: THE EQUILIBRIUM STRUCTURE OF PROTONATED NITROGEN DETERMINED FROM HIGH RESOLUTION INFRARED SPECTROSCOPY Creators: Owrutsky, J. C.; Gudeman, Christopher S.; Martner, C. C.; Rosenbaum, N. H.; Tack, L. M.; Saykally, R. J. Issue Date: 1985 Publisher: Ohio State University Abstract: The $(11^{1} 0) \leftarrow (01^{1} 0)$ hot band of protonated nitrogen ($N_{2}H^{+}$) has been measured using a color center laser and the technique of velocity modulation. High-J (up to J=40) lines, in addition to those previously reported (1), have also been measured in the $\nu_{1}$ vibration. This data was combined with the relevant published work to enable an equilibrium structure to be calculated. Rotational transitions have been reported by Szanto et al. (2), Van den Heuval and Dymanus (3) and Sastry et al. (4). The $\nu_{2}$ bands of $N_{2}H^{+}$ and $N_{2}D^{+}$ have been observed by Sears. (5,6). The $\nu_{j}$ of $N_{2}H^{+}$ and $N_{2}D^{+}$ have been measured by Foster and McKellar (7) while the $\nu_{1}$ and $(11^{1} 0) + (01^{1} 0)$ hot band have been observed by Nesbitt et al. (8). These data have been combined in a weighted least squares analysis to yield rotational constants, centrifugal distortion constants and 1-type doubling constants. Using this information, we have calculated the equilbrium structure of protonated nitrogen. Description: 1. C.G. Gudeman, M.H. Begemann, J.Pfaff and R.J. Saykally, J. Chem. Phys. 78, 5837 (1983). 2. P.G. Szanto, T.G. Anderson, R.J. Saykally, N.D. Piltch, J.A. Dixon, and R.C. Woods, J. Chem. Phys. 75, 4261 (1981). 3. T.C. Van der Heuval and A. Dymanus, Chem. Phys. Lett. 92, 219 (1982). 4. K.V.L.N. Sastry, P. Helminger, E. Herbst and F.C. Delucia, Chem. Phys. Lett. 84, 286 (1981). 5. T.J. Sears, J. Opt. Soc. Amer. 8. 2, XX (1985). 6. T.J. Sears, preprint. 7. S.C. Foster and A.R. W. McKellar, J. Chem. Phys. 81, 3423 (1984). 8. D.J. Nesbitt, H. Petek, C.S. Gudeman, C.B. Moore and R.J. Saykally, J. Chem. Phys. 81, 5281 (1984). This work was supported by the National Science Foundation, Structure and Thermodynamics Program. Author Institution: Department of Chemistry, University of California-Berkeley; Department of Chemistry, IBM - Thomas J. Watson Research Center; Department of Chemistry, University of California-Berkeley; Department of Chemistry, University of California-Berkeley; Department of Chemistry, University of California-Berkeley; Department of Chemistry, University of California-Berkeley URI: http://hdl.handle.net/1811/12239 Other Identifiers: 1985-TE-1