Identification of the OC–IH isomer based on near-infrared diode laser spectroscopy

The near-infrared ν2+ν51 combination bands of OC–HI and its isomeric form OC–IH have been recorded using a high-frequency wavelength modulation diode laser supersonic jet spectrometer. In addition, the ν2 spectral region has been reinvestigated, leading to the assignment of the ν2 fundamental in the isomeric species, OC–IH. The ν1 band of OC–HI has also been rovibrationally assigned. The results are used to give qualitative information concerning the nature of molecular dynamics in this complex and its relation to that of other members in the homologous series OC:HX (X=F, Cl, Br, and I).