Intermolecular state dependence of the vibrational predissociation of N2HF

Abstract

Three new combination bands, at the second overtone of the HF intramolecular stretch, 3ν1, with each of the three low frequency intermolecular modes, have been spectroscopically characterized by intracavity laser-induced fluorescence for the N2HF complex. The van der Waals stretching, HF and N2 bending frequencies at vHF=3 are determined to be 98.6, 328.6, and 68.5 cm−1, respectively. State dependent vibrational predissociation is observed in these three bands. The variation in the vibrational predissociation rate in these three bands suggests a strong angular dependence of the intermolecular potential with the HF internuclear distance in the complex.