ANALYSIS OF THE INFRARED SPECTRUM OF THE $\nu_{6}$ DEFORMATION MODE OF $H_{2}O_{2}$

Abstract

The infrared spectrum of the 8$\mu m$ bending mode of hydrogen peroxide has been recorded with resolution of $0.02 cm^{-1}$ ($1170-1350 cm^{-1}$). This spectrum has been supplemented with tuneable diode laser scans in selected regions (Doppler Limited resolution) to aid in identification and assignments in the denser regions of the spectrum. Although internal rotation of the two O-H pairs through two non-equivalent barriers splits each overall rotational transition into a quartet, the initial analysis has concentrated on the approximation that the band is simply doubled. Analysis of the strong parallel components of these hybrid bands leads to a torsional barrier of $W_{6} = 20.54 \mbox{cm}^{-1}$ with the center of the $\tau^{\prime} = 1,2\rightarrow\tau^{\prime} 1,2$ band at $1264.58 \mbox{cm}^{-1}$ and the center of the $\tau^{\prime} = 3,4\rightarrow\tau = 3,4$ band at $1273.68 \mbox{cm}^{-1}$. The result of a complete analysis of these bands within the framework of a Watson-type Hamiltonian will be presented.