<p> Three electronic absorption systems of the S2O molecule, each having discrete vibrational structure, were observed in the spectral region 2000 - 7400 Ȧ. Long pressure path lengths were used to observe very weak absorption bands. Two of these spectral systems have not been observed previously. Vibrational analyses of the spectral systems were made. The quasilinear character of the ground electronic state of S2O has been established.</p> / Thesis / Doctor of Philosophy (PhD)

<p> Three electronic absorption systems of the fluorosulfate radical in the gas phase have been observed in the near infrared and visible regions of the spectra and have been assigned to the electronic transitions 2E(2) - 2A2, 2E(l)- 2A2 and 2A1- 2A2 . Molecular orbital calculations on the fluorosulfate radical have been done in order to aid the interpretation of the electronic spectra of the radical. Vibrational and rotational analyses of the visible absorption system ( 2E (2)- 2A 2) have been carried out. The geometry of the radical in the upper 2 E(2) state has been found to be similar to that of the 2A2 ground state. The ground state fundamental frequencies of the radical have been determined. The presence of a Jahn-Teller-spin-orbit interaction has been proposed for the 2E(2) state. </p> / Thesis / Doctor of Philosophy (PhD)

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