A spectroscopic study of CaOCH3 using the pump/probe microwave and the molecular beam/optical Stark techniques

Kei Ichi C Namiki, J. Scott Robinson, Timothy Steimle

Research output: Contribution to journalReview articlepeer-review

18 Scopus citations


The Stark effect on the qR22(0,0.5) (ν=17682.9251cm-1) and qP11(0,1.5) (ν=17682.1966cm-1) branch features of the (0,0) B2A1-X2A1 band system of calcium methoxide, CaOCH3, was measured and analyzed to give the magnitude of the permanent electronic dipole moments, μ, of 1.58(8) D and 1.21(5) D for the X2A1 and B2A1 states, respectively. The dipole moments are compared with other monovalent calcium compounds and those predicted from a simple electrostatic model. Pure rotational transitions in the X2A1 state were recorded using the pump/probe microwave-optical double resonance technique. The proton magnetic hyperfine splitting pattern confirms a C3v symmetry of the ground electronic state. The determined Fermi contact and dipolar parameters are: aF=-0.421(27)MHz; Taa=1.070(45)MHz, and Tbb-Tcc=0.292(47)MHz. The latter parameter is associated with the lifting of the K-degeneracy of this symmetric top molecule and mixing the I0=1/2 and I0=3/2 levels.

Original languageEnglish (US)
Pages (from-to)5283-5289
Number of pages7
JournalJournal of Chemical Physics
Issue number13
StatePublished - 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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