Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...369l..13p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 369, March 1, 1991, p. L13-L16. Research supported by CNRS.
Astronomy and Astrophysics
Astronomy
50
Aromatic Compounds, Cyano Compounds, Dipole Moments, Free Radicals, Hydrocarbons, Interstellar Matter, Molecular Clouds, Molecular Orbitals, Radio Astronomy
Scientific paper
Rotational constants and dipole moments for linear-chain radicals CnCH and CnN are estimated using a combinatiaon of ab initio molecular orbital calculations and observed data on the starting members of the series. CnCH with n = 0-5 have been observed by radioastronomy in carbon-rich interstellar clouds; higher members of the series have 2Pi ground states with large dipole moments and are strong candidates for observation. CN and C3N have also been observed by radioastronomy; higher members of the series, with the possible exception of C5N, have 2Pi ground states with near-zero dipole moments making their interstellar detection hopeless under present observational conditions. C5N can be a strong candidate only if it has a 2Sigma ground state, and best computations so far indicate that this is not the case.
Ellinger Yves
McLean A. D.
Pauzat Francoise
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