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 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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)
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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).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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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
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 15-Dec-2008