The submillimeter-wave spectrum of KCCH (X1Σ)

J. Xin, L. M. Ziurys

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The pure rotational spectrum of KCCH (X1Σ) has been observed in the laboratory for the first time using millimeter/submillimeter direct absorption techniques. Thirty-seven rotational transitions of this molecule were recorded in the range 225-490 GHz, and 15 transitions were recorded for its deuterium isotopomer, KCCD. Both species were created by the reaction of potassium metal and acetylene or deuterated acetylene under DC discharge conditions. The transition frequencies were analyzed to produce precise spectroscopic constants for KCCH and KCCD. This study is the first experimental information available for potassium monoacetylide and indicates that it is a linear species, with some, but not total, ionic character to its bonding. Rest frequencies are also now available for KCCH for astronomical searches.

Original languageEnglish (US)
Pages (from-to)L151-L153
JournalAstrophysical Journal Letters
Issue number1
StatePublished - Jul 1 1998


  • ISM: molecules
  • Line: identification
  • Molecular data

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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