The Ohio State University International Symposium on Molecular Spectroscopy 68th Meeting - - June 17-21, 2013 Microwave Spectrum of Hexafluoroisopropanol, comparison with hexafluoroisobutene And its complex with water Abhishek Shahi and E. Arunan Department of Inorganic and Physical Chemistry Indian Institute of Science Bangalore, India Complete study of Hexafluoroisopropanol with all of its C-13 and duterated isotopologues. Comparison with prototype molecules. Microwave study of HFIP-water complex. Interesting properties of HFIP Rotational Spectroscopic Low vapor pressure and boiling point. Offer different possibility for intermolecular interaction. Chemist and society Solvent for polymers (e.g. polythene ) Strong affinity for oxygen Two conformers have been reported at room temperature in IR spectra, namely antiperiplaner (ap) and synclinical (sc). IR study: In gas phase, ap conformer is more stable while in liquid phase, sc conformer is more stable. Is it possible to get both conformer with supersonic beam experiment ? H. Schaal, T. Hber, M. Suhm, Hydrogen Bonding in 2-Propanol. The Effect of Fluorination, The Journal of Physical Chemistry A 104 (2000) 265274. ap sc HFIP (ap) 7F-2C-3C-12F = 0 Low Vib. Freq. = 32 cm -1 = HFIB 4F-2C-3C-9F = 23.5 Low Vib. Freq. = 39 cm -1 = Bis-trifluoromethyl effect: Doubled Transitions in the rotational spectra of HFIB. Same Behavior: Hexafluoroacetone imine Will Hexafluoroisopropanol show doubling in spectrum ? Pulsed Nozzle Fourier Transform Microwave Spectroscopy. Calculated transitions are very close to experimentally observed lines. 111 Transitions could be fitted in rotational Hamiltonian within experimental uncertainty. There are about 35 unassigned lines but no signature of splitting of any kind. R-b type transitions TransitionsFrequencyO-C 1, 1, 1