The CF,I(5pr-6s) Rydberg transitions in the energy range 56 700-64 000 cm-' are investigated using (2+ 1) resonance-enhanced multiphoton ionization. The polarization of the twophoton transitions is used to definitely assign the symmetries of the resonant intermediate states. The four allowed electronic transitions in the (5p~-6s) manifold have been assigned and some vibrational constants in the excited states have been determined. Hot band spectra have been obtained in a supersonic expansion of CF,I through an oven. The upper spin-orbit components (the 2E1,2 ion core states) are perturbed by a dissociative state at approximately 63 000 cm-', possibly the (T-O* transition centered on the C-I bond. Density functional calculations have been performed in order to help determine the nature of the perturbing states. Vibronic interactions in the excited states are investigated, and evidence is seen for quadratic Jahn-Teller interactions for y6 in the lower (2E3,2> spin-orbit state.

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The molecular species In2O has been identified in the gas phase as a product of the high temperature reaction between water and indium (850 °C) or between indium trioxide (In2O3) and indium (950 °C) by the observation of an electronic transition in the near-ultraviolet. The spectra are simplified by supersonic cooling of the sample in a free jet expansion after it is formed. The vibrational structure shows that the molecule has a very similar geometry in the two states involved while the 18O/16O isotope shift suggests that the molecule is only slightly nonlinear in the excited electronic state. Rotational structure can be resolved at high resolution and shows an intensity alternation; the molecule thus has a symmetric In–O–In arrangement.

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