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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry