LABORATORY DETECTION OF PROPADIENYLIDENE, H2CCC

被引：112

作者：

VRTILEK, JM ^{[1
]}

GOTTLIEB, CA ^{[1
]}

GOTTLIEB, EW ^{[1
]}

KILLIAN, TC ^{[1
]}

THADDEUS, P ^{[1
]}

机构：

[1] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 364卷 / 02期

关键词：

Interstellar: molecules; Laboratory spectra; Line identifications; Molecular processes; Radio sources: lines;

D O I：

10.1086/185873

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

From laboratory measurement of more than 50 lines of its rotational spectrum, we have identified for the first time in the gas phase propadienylidene, H2CCC, a highly polar carbene and the lowest energy isomer of a readily observed interstellar molecule, the cyclopropenylidene ring c-C3H2. The rotational and centrifugal distortion constants of H2CCC have been determined to sufficient accuracy to predict frequencies of the astronomically interesting lines in the radio spectrum to an uncertainty of 0.1 km s-1 or better. Propadienylidene is now an excellent candidate for interstellar and circumstellar detection; if found, it would be of interest as one of only a few known interstellar isomers and the first of a predicted series of highly polar cumulene carbenes.

引用

页码：L53 / L56

页数：4

共 23 条

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