Abstract

The pulsed jet millimeter wave spectra of five isotopomers of the weakly bonded oxirane⋯Xe complex have been measured. Information on the equilibrium conformation, dynamics and dissociation energy have been deduced. The equilibrium distance of Xe with respect to the center-of-mass of the molecules is 3.82 Å, with Xe tilted 15° from the perpendicular to the center-of-mass of the ring toward the oxygen atom. The dissociation energy is estimated, from the centrifugal distortion constant DJ, to be ≈3.9 kJ/mol.

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