Is interstellar acetone produced by ion-molecule chemistry

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169000· OSTI ID:6592096

Herbst, E; Giles, K; Smith, D ^[1]

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1. Duke Univ., Durham, NC (USA) Birmingham Univ. (England)

The rate coefficient for the ion-molecule radiative association reaction CH3(+) + CH3CHO - (CH3)2CHO(+) has bee calculated in the range 10-300 K with the phase-space techique and the aid of a laboratory measurement of the analogous three-body association at room temperature. It has been suggested by Combes et al. (1987) that this reaction followed by dissociative recombination is responsible for the observed abundance of acetone (CH3COCH3) in Sgr B2. However, it is shown here that the radiative association reaction is probably too slow even at 10 K to lead to the observed abundance of acetone in this source. The question of how acetone is produced in Sgr B2 is thus still unanswered. 26 refs.

• OSTI ID: 6592096
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 358; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ACETONE
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMISTRY
COSMOCHEMISTRY
ELEMENT ABUNDANCE
INTERSTELLAR SPACE
IONS
KETONES
KINETICS
ORGANIC COMPOUNDS
REACTION KINETICS
RECOMBINATION
SPACE