Abstract
The rotationally resolved spectra of the van der Waals complexes Ne–N2O, Kr–N2O, and Xe–N2O have been investigated in the region of the ν3N2O monomer vibrational band using a diode laser absorption spectrometer that is incorporated with a multipass cell and a pulsed jet. The spectra of these three complexes are completely analyzed using a normal asymmetric rotor Hamiltonian, and the effective molecular constants are accurately determined for both the ground and the excited vibrational states. These results show that, like Ar–N2O, the complexes have a T-shaped configuration in which the rare gas atom prefers to lie near to the oxygen side of N2O. The band origins ofRg–N2O (Rg= Ne, Ar, Kr, and Xe) are observed to shift by 0.36125, 0.15038, −0.10131, and −0.49066 cm−1from that of the monomer, respectively. These band origin shifts are well explained by a simple model for the intermolecular potential.
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