dc.creator Grubbs, G. S., II en_US dc.creator Cooke, S. A. en_US dc.creator Groner, P. en_US dc.date.accessioned 2011-07-12T17:28:43Z dc.date.available 2011-07-12T17:28:43Z dc.date.issued 2011 en_US dc.identifier 2011-RH-04 en_US dc.identifier.uri http://hdl.handle.net/1811/49362 dc.description Author Institution: Department of Chemistry, The University of North Texas, 1155 Union Circle, # 305070 Denton, TX 76203-5017, USA; Department of Chemistry, University of Missouri-Kansas City, 5100 Rockhill Road, Kansas City, MO 64110 en_US dc.description.abstract We have used chirped pulse Fourier transform microwave spectroscopy to record the pure rotational spectrum of the title molecule. The spectrum was doubled owing to the internal rotation of the methyl group. The spectrum has been assigned and two approaches to the spectral analysis have been performed. In the first case, the $A$ and $E$ components were fit separately using a principal axis method with the SPFIT code of Pickett. In the second case, the $A$ and $E$ states were fit simultaneously using the ERHAM code. For a satisfactory analysis of the spectral data it has been found that the choice of Hamiltonian reduction, i.e. Watson A or S, is very important. The barrier to the internal rotation has been determined to be 261.1(8) cm$^{-1}$ and it will be compared to that of acetone and other halogenated acetone species recently studied in our laboratory. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title METHYL GROUP INTERNAL ROTATION IN THE PURE ROTATIONAL SPECTRUM OF 1,1-DIFLUOROACETONE en_US dc.type Article en_US dc.type Image en_US dc.type Presentation en_US
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