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 i odides with oxygen atoms are observed by Fourier transform infrared em ission spectroscopy. The upsilon = 1-3 levels of the OH stretch are ob served via the Delta upsilon = -1 and Delta upsilon = -2 sequence band s. The spectrum of DOI is observed by using 2,2,2-d(3)-iodoethane as t he precursor in the oxygen atom reaction. The upsilon = 1-4 levels of the OD stretch are observed in the Delta upsilon = -1 sequence band, a nd the upsilon = 1-5 levels of the OD stretch are observed in Delta up silon = -2. Medium resolution spectra (0.031 cm(-1) apodized) are reco rded and rotationally analyzed for the nu(1) fundamental and 2 nu(1)-n u(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 HOB r and calculating the HOI bond angle and the OI bond length by least s quares fit to the ground state rotational constants. (C) 1996 American Institute of Physics.