Abstract
We report the unequivocal identification of the r Q 3 branch of perdeutero oxadisulfane, DSOD, which has been produced in a discharge of D 2S together with D 2O. By employing the Cologne Terahertz Spectrometer, we have located the band center near 653 GHz, in very close agreement with earlier results deduced from the r Q 0 and r Q 2 branches. The A 0, B 0, and C 0 rotational constants have been determined by carrying out an asymmetric rotor least squares fit with all presently available data, including new R- and P-branch lines. Both, b- and c-type transitions have been observed and the relative dipole moment μ c/ μ b has been determined from relative line strengths. All results agree very well with quantum chemically calculated values.
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