Universität zu Köln

Belloche, Arnaud, Garrod, Robin T., Mueller, Holger S. P. and Menten, Karl M. (2014). Detection of a branched alkyl molecule in the interstellar medium: iso-propyl cyanide. Science, 345 (6204). S. 1584 - 1588. WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE. ISSN 1095-9203

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Abstract

The largest noncyclic molecules detected in the interstellar medium (ISM) are organic with a straight-chain carbon backbone. We report an interstellar detection of a branched alkyl molecule, iso-propyl cyanide (i-C3H7CN), with an abundance 0.4 times that of its straight-chain structural isomer. This detection suggests that branched carbon-chain molecules may be generally abundant in the ISM. Our astrochemical model indicates that both isomers are produced within or upon dust grain ice mantles through the addition of molecular radicals, albeit via differing reaction pathways. The production of iso-propyl cyanide appears to require the addition of a functional group to a nonterminal carbon in the chain. Its detection therefore bodes well for the presence in the ISM of amino acids, for which such side-chain structure is a key characteristic.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Belloche, Arnaud UNSPECIFIED UNSPECIFIED UNSPECIFIED Garrod, Robin T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Holger S. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Menten, Karl M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-428416
DOI:	10.1126/science.1256678
Journal or Publication Title:	Science
Volume:	345
Number:	6204
Page Range:	S. 1584 - 1588
Date:	2014
Publisher:	AMER ASSOC ADVANCEMENT SCIENCE
Place of Publication:	WASHINGTON
ISSN:	1095-9203
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SAGITTARIUS B2(N) Multiple languages Multidisciplinary Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/42841