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J/ApJS/169/28    Rotational transitions of Methyl carbamate   (Groner+, 2007)
The millimeter- and submillimeter-wave spectrum of methyl carbamate
[CH3OC(:O)NH2].
    Groner P., Winnewisser M., Medvedev I.R., De Lucia F.C., Herbst E.,
    Sastry K.V.L.N.
   <Astrophys. J. Suppl. Ser., 169, 28-36 (2007)>
   =2007ApJS..169...28G
ADC_Keywords: Atomic physics ; Millimetric/submm sources ; Spectroscopy

Keywords: catalogs - submillimeter - techniques: spectroscopic


Abstract:
    The rotational-torsional spectrum of the syn conformer of methyl
    carbamate [CH3OC(:O)NH2], an isomer of the essential amino acid
    glycine [NH2CH2C(:O)OH], has been recorded at room temperature in
    the spectral region from 79 to 371GHz. Methyl carbamate possesses a
    methyl group internal rotor, which gives rise to A and E torsional
    substates, and associated splittings in the rotational spectrum.
    Almost 6000 new rotational transitions arising from the vibrational
    ground state have been assigned, about half of them belonging to the E
    torsional substate. The Fast Scan Submillimeter-wave Spectroscopic
    Technique (FASSST) spectrometer at the Ohio State University was used
    for the present measurements

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        59     6365   Assigned and fitted rotational transition
                             frequencies of methyl carbamate in its ground
                             vibrational state
table4.dat        51    13665   Predicted rotational-transition frequencies for
                             methyl carbamate in its ground vibrational state


See also:
  J/A+A/406/L47  : 17OH spin-rotation transition frequencies (Polehampton+ 2003)
  J/ApJ/500/1059 : Dimethyl ether transitions frequencies (Groner+, 1998)
  J/ApJS/162/428 : n-propanol transition frequencies (Maeda+, 2006)
  J/ApJS/166/650 : mm/submm spectrum of iso-propanol (Maeda+, 2006)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label   Explanations

       1  I1    ---     sig1    [0/1] Symmetry number (0=A-state, 1=E-state)
   3-  4  I2    ---     J1      The J upper state
   6-  7  I2    ---     Ka1     The Ka upper state
   9- 10  I2    ---     Kc1     The Kc upper state
  12- 13  I2    ---     J2      The J lower state
  15- 16  I2    ---     Ka2     The Ka lower state
  18- 19  I2    ---     Kc2     The Kc lower state
  21- 31  F11.4 MHz     Freq    Frequency of transition
  33- 36  F4.2  ---     Coeff   ? Coefficient of linear combination in blended
                                 transitions
  38- 40  F3.1  MHz     e_Freq  Estimated experimental uncertainty in Freq (1)
  42- 49  F8.4  MHz     (O-C)   Residual in least-squares fit
  51- 57  F7.4  MHz     (O-C)B  ? Residual of blend in least-squares fit
      59  A1    ---     r_Freq  [BM] Source of experimental frequency if not
                                 from FASSST measurements (2)

Note (1): Frequency received zero weight in least-squares fit if e_Freq=0.

Note (2): Experimental frequencies from sources B and M were available with
     two digits following the decimal place. Experimental frequencies
     between 79 and 118GHz were available with three digits following the
     decimal place. Com is defined as:
    B = Bakri et al. (2002, J. Mol. Spectrosc., 215, 312),
    M = Marstokk & Moellendal (1999, Acta Chem. Scandinavica, 53, 79).


Byte-by-byte Description of file: table4.dat

   Bytes Format Units     Label    Explanations

       1  I1    ---       sig1     [0/1] Symmetry number (0=A-state, 1=E-state)
   3-  4  I2    ---       J1       The J upper state
   6-  7  I2    ---       Ka1      The Ka upper state
   9- 10  I2    ---       Kc1      The Kc upper state
  12- 13  I2    ---       J2       The J lower state
  15- 16  I2    ---       Ka2      The Ka lower state
  18- 19  I2    ---       Kc2      The Kc lower state
  21- 30  F10.3 MHz       Freq     Frequency of transition
  32- 36  F5.3  MHz       e_Freq   Estimated uncertainty in Freq
  38- 43  F6.3  ---       S        Line strength (b-type)
  45- 51  F7.3  cm-1      Eup/hc   Upper state energy


History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    15-Dec-2008