The Microwave Rotational Spectrum of the Ne–N2O van der Waals Complex.
Mwaniki S. Ngari and Wolfgang Jäger
Department of Chemistry, University of Alberta, Edmonton AB T6G 2G2, Canada
Rotational spectra of six isotopomers of the van der Waals dimer Ne–N2O were measured in the frequency range from 5 to 18 GHz using a pulsed beam cavity Fourier transform spectrometer. The spectra indicate that the complex is a prolate near symmetric rotor with a T-shaped structure. The Ne atom is on average closer to the O atom than to the terminal N atom. Both a- and b-type transitions were measured. The nuclear quadrupole hyperfine pattern due to two 14N nuclei were resolved. Rotational and centrifugal distortion constants were determined, as well as the nuclear quadrupole coupling constants χaa(1), χbb(1), χaa(2), χbb(2). Effective values for the distance from the center of mass of the N2O subunit to the Ne atom, and for the angle between this distance and the N2O axis were obtained.