Abstract
The diode laser spectrum and the IR LMR spectrum of the ν3 fundamental band (O–O stretch) of DO2 were observed, as well as the diode laser spectrum of the ν2 fundamental band (D–O–O bend). Simultaneous analysis of the ν3 and ν2 bands has yielded the molecular constants for the (001) and (010) states and the Coriolis coupling constant. These, together with other available molecular constants for DO2 and HO2 were used to derive the equilibrium molecular structure of the HO2 radical, as already reported [K. G. Lubic et al., J. Chem. Phys. 81, 4826 (1984)]. The harmonic force field obtained in the present study has explained well the general features of the Coriolis coupling constant, quartic centrifugal distortion constants, and the inertia defects for DO2.
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