Velocity Modulation Laser Spectroscopy of Negative Ions: The v3 Band of Azide (N3-)

Mark Polak, Martin Gruebele, Richard J. Saykally

Research output: Contribution to journalArticlepeer-review


Thirty-four transitions in the v3(asymmetric stretch) fundamental of the azide anion have been measured in an NH3/N2O discharge by using diode laser velocity modulation spectroscopy. The data, ranging from P(42) to R(62), were fit to a linear molecule effective Hamiltonian through quartic terms. The vibrational band origin was determined to be v3= 1986.4672 (19) cm-1and the rotational constants are Bʺ = 0.426 203 (57) and Bʹ = 0.422 572 (55) cm-1. Comparisons with ab initio calculations and condensed phase measurements are presented. The observed 2:1 intensity alternation in successive rotational lines establishes the centrosymmetric structure of the anion (r0= 1.188402 (82) Å).

Original languageEnglish (US)
Pages (from-to)2884-2887
Number of pages4
JournalJournal of the American Chemical Society
Issue number10
StatePublished - May 1 1987
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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