Accession Number : ADD095021

Title :   Microwave Spectra of Molecules of Astrophysical Interest. I. Formaldehyde, Formamide, and Thioformaldehyde,


Personal Author(s) : Johnson,Donald R ; Lovas,Frank J ; Kirchhoff,William H

Report Date : Jan 1973

Pagination or Media Count : 38

Abstract : The available data on the microwave spectra of formaldehyde, formamide, and thioformaldehyde are critically reviewed for information applicable to radio astronomy. Molecular data such as rotational constants, centrifugal distortion parameters, dipole moments, hyperfine coupling constants, and structural parameters are tabulated. Observed rotational transitions are presented for the astronomically interesting isotopic forms of these molecules when available. Detailed centrifugal distortion calculations have been carried out for the most abundant isotopic forms of these molecules, namely, H(2)(12)C(16)O, H(2)(13)C(16)O, (14)NH(2)(12)CH(16)O, and H(2)(12)C(32)S. Transitions have been predicted and tabulated for the frequency ranges 1 MHz to 300 GHz for H(2)(12)C(16)O, 100 MHz to 300 GHz for H(2)(13)C(16)O, 500 MHz to 180 GHz for (14)NH(2)(12)CH(16)O, and 100 MHz to 300 GHz for H(2)(12)C(32)S. All predicted transitions include 95 percent confidence limits; measured transition error limits have been reproduced from the original literature. References are given for all data included. (Author)

Descriptors :   *Molecular spectroscopy, *Microwaves, *Molecular structure, *Formaldehyde, Constants, Formamides, Astrophysics, Thiols, Computations, Molecular rotation, Distortion, Centrifugal fields, Dipole moments, Coupling(Interaction), Hyperfine structure, Spectra, Tables(Data), Transitions

Distribution Statement : APPROVED FOR PUBLIC RELEASE