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Title:
Hydroxycarbene /HCOH/ and protonated formaldehyde - Two potentially observable interstellar molecules
Authors:
Hoffmann, M. R.; Schaefer, H. F., III
Affiliation:
AA(California, University, Berkeley, CA), AB(California, University, Berkeley, CA)
Publication:
Astrophysical Journal, Part 1, vol. 249, Oct. 15, 1981, p. 563-565. (ApJ Homepage)
Publication Date:
10/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
CARBENES, FORMALDEHYDE, INTERSTELLAR CHEMISTRY, INTERSTELLAR MATTER, MOLECULAR CLOUDS, RECOMBINATION REACTIONS, GAS DISSOCIATION, HYDROXYL COMPOUNDS, MICROWAVE SPECTRA, MOLECULAR ROTATION, OXYGEN ATOMS
Comment:
A&AA ID. AAA030.022.096
DOI:
10.1086/159315
Bibliographic Code:
1981ApJ...249..563H

Abstract

It is known that the lowest energy isomer of protonated formaldehyde has the proton attached to the oxygen atom, i.e.,

H H
\ /
\ /
C ---O ⊕.
/
/
H

Therefore, a purely statistical argument would suggest that the hydroxycarbene molecule HCOH is twice as likely as formaldehyde to be formed from H3CO + via dissociative recombination, a process generally considered to be very important in interstellar clouds. Theoretical studies show that, while HCOH has never been observed in the laboratory, it should nevertheless be a relatively stable molecule. Theoretical equilibrium structures for H3CO+ and HCOH suggest that they may be observed at 63.5 and 68.4 GHz respectively.

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