Abstract book - Prof. Per Jensen, Ph.D. - Bergische Universität ...

Poster session, H4 117Rapid capture of large amplitude motions in 2,6-difluorophenolDavid A. Dewald 1 , Michaela K. Jahn 1 , Dennis Wachsmuth 1 , Jens-Uwe Grabow 1 ,Suresh C. Mehrotra 21 Gottfried Wilhelm Leibniz Universität Hannover, Germany,david.dewald@pci.uni-hannover.de2 Dr. Babasaheb Ambedkar Marathwada University, IndiaDewald D.A.Jahn M.K.Wachsmuth D.Grabow J.-U.Mehrotra S.C.The rotational supersonic-jet Fourier transform microwave (FT-MW) spectra of thearomatic 2,6-difluorophenol (DFP) have been recorded and analyzed in the frequencyrange of 8-26 GHz. A new design of broadband FT-MW spectroscopy with inphase/quadrature-phase-modulationpassage-acquired-coherence technique (IMPACT)has been used to obtain the spectra rapidly at high-resolution, obsoleting subsequentmeasurements with a resonator spectrometer.The structural analysis shows that the H-atom of the hydroxyl-group is located in thebenzene plane forming an intramolecular hydrogen bond with one of the F-atoms. Dueto the tunneling motion of this H-atom between two the equivalent positions, a largepart of the rotational transitions are split into two signals being separated by ~17 MHz.The rotational constants, centrifugal distortion constants and the Coriolis couplingconstant have been determined.