Structural studies of alkali methylidyne radicals: High resolution spectroscopy of NaCH and KCH (X̃3Σ-)

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Abstract

High resolution spectroscopic measurements have been carried out for alkali methylidyne radicals. The pure rotational spectra of NaCH and KCH, along with their deuterium isotopomers, have been recorded in the frequency range 328-529 GHz using millimeter/submillimeter direct absorption techniques. These molecules were created in a dc discharge by the reaction of metal vapor and CH4 or CD4. These data indicate that KCH and NaCH are linear molecules with 3Σ- ground electronic states arising from a π2 configuration. Spectroscopic constants for KCH and NaCH have been determined from the data, including rotational, spin-spin, and spin-rotation parameters, as well as bond lengths. In comparison with other alkali and transition metal-bearing molecules, these results suggest some degree of covalent bonding in the alkali methylidynes, with carbon atom undergoing sp hybridization.

Original languageEnglish (US)
Pages (from-to)3360-3367
Number of pages8
JournalThe Journal of Chemical Physics
Volume110
Issue number7
StatePublished - Feb 15 1999

Fingerprint

Alkalies
alkalies
Spectroscopy
methylidyne
Molecules
high resolution
Bearings (structural)
spectroscopy
molecules
metal vapors
Deuterium
rotational spectra
Bond length
Electronic states
Alkali metals
Discharge (fluid mechanics)
alkali metals
Transition metals
deuterium
Carbon

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Structural studies of alkali methylidyne radicals : High resolution spectroscopy of NaCH and KCH (X̃3Σ-). / Xin, J.; Ziurys, Lucy M.

In: The Journal of Chemical Physics, Vol. 110, No. 7, 15.02.1999, p. 3360-3367.

Research output: Contribution to journalArticle

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