Axis Switching in the Transition of HCO: Determination of Molecular Geometry

Authors:
  • JBJ. M. Brown
    J. M. Brown
  • DRD. A. Ramsay
    D. A. Ramsay
Publisher website
Google Scholar
Abstract
The [ ] band systems of HCO and DCO have been reinvestigated with higher resolving power than in earlier work. Some weak lines have been assigned to K′ = 0 – K″ = 0 and K′ = 0 – K″ = 2 subbands; these lines derive their intensity from axis switching. The new data give values for the A rotational constants of HCO and DCO and permit a more reliable determination of the ground state geometry, viz, r0(CH) = 1.125(5) Å, r0(CO) = 1.175(1) Å, [ ]. The sign of the spin–rotation constant εaa has been shown to be positive.