Rotational analysis and vibrational predissociation in the ν2 band of HCN dimer

Abstract

The rovibrational infrared spectrum of the bound C-H stretching vibration, ν2, in the HCN dimer has been analyzed. Observed transition frequencies have been combined with previously recorded microwave data to obtain the following molecular parameters (in cm-1): ν2 = 3241.5696(8), α2= - 0.000 110(1), B″ = 0.058 233 92(1), B′ = 0.058344(1), D″J = 0.7013(52) × 10 -7, D′J = 0.6636(18) × 10-7. The observed full widths at half-maximum intensity of the observed transitions are consistent with excited state lifetimes of 1.7(4) × 10-9 s. © 1986 American Institute of Physics.