ROTATIONAL ANALYSIS OF THE HIGH-RESOLUTION INFRARED-SPECTRA OF THE NU-4 AND NU-5 BANDS OF FORMYL CHLORIDE

The high-resolution infrared spectra of the low-lying nu4 and nu5 fund amentals of the transient molecule formyl chloride, HCOCl, are reporte d. Both thype A/B hybrid bands have been analyzed in detail, providing rotational assignments for the HCO Cl-35 and HCO Cl-37 isotopomers. T he excited state rotational and centrifugal distortion constants have been determined by fitting assignments over a wide range of J and K(a) values. No perturbations were detected in either band. (C) 1991 Acade mic Pess, Inc.