Detection and Characterization of the Cumulene Carbenes H 2 C 5 and H 2 C 6-Reference-Cited by-同舟云学术

Detection and Characterization of the Cumulene Carbenes H 2 C 5 and H 2 C 6

Published:1997-01-24 Issue:5299 Volume:275 Page:518-520
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

McCarthy M. C.¹,Travers M. J.¹,Kovács A.²,Chen Wei³,Novick Stewart E.³,Gottlieb C. A.²,Thaddeus P.¹

Affiliation:

1. M. C. McCarthy, M. J. Travers, P. Thaddeus, Division of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA, and Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA.

2. A. Kovács and C. A. Gottlieb, Division of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.

3. W. Chen and S. E. Novick, Department of Chemistry, Wesleyan University, Middletown, CT 06459, USA.

Abstract

Two cumulene carbenes, H 2 C 5 and H 2 C 6 , were detected in a supersonic molecular beam by Fourier transform microwave spectroscopy. Their rotational and leading centrifugal distortion constants were determined with high accuracy, such that the entire radio spectrum can now be calculated. Like the known carbenes H 2 C 3 and H 2 C 4 , both molecules have singlet electronic ground states and linear carbon-chain backbones. They can be produced in sufficiently high concentrations in the laboratory that their electronic spectra, expected to lie in the visible, should be readily detectable by laser spectroscopy. The microwave spectra of other, more exotic isomers may be detectable as well.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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