Observation of the nu(1) OH(OD) stretch of HOI and DOI by Fourier transform infrared emission spectroscopy

The spectra of vibrationally hot HOI formed in the reaction of alkyl iodides with oxygen atoms are observed by Fourier transform infrared emission spectroscopy. The upsilon = 1-3 levels of the OH stretch are observed via the Delta upsilon = -1 and Delta upsilon = -2 sequence bands. The spectrum of DOI is observed by using 2,2,2-d(3)-iodoethane as the precursor in the oxygen atom reaction. The upsilon = 1-4 levels of the OD stretch are observed in the Delta upsilon = -1 sequence band, and the upsilon = 1-5 levels of the OD stretch are observed in Delta upsilon = -2. Medium resolution spectra (0.031 cm(-1) apodized) are recorded and rotationally analyzed for the nu(1) fundamental and 2 nu(1)-nu(1) hot band of HOI. An estimate of the HOI ground state structure is made by constraining the OH bond length to its value for HOCl and HOBr and calculating the HOI bond angle and the OI bond length by least squares fit to the ground state rotational constants. (C) 1996 American Institute of Physics.