Details
| Original language | English |
|---|---|
| Pages (from-to) | 305-310 |
| Number of pages | 6 |
| Journal | Astrophysical Journal |
| Volume | 513 |
| Issue number | 1 PART 1 |
| Publication status | Published - 1 Mar 1999 |
Abstract
The highly polar ring-chain carbenes HC4N and HC6N, formed by substituting either CN or CCCN for a hydrogen atom in cyclopropenylidene (C-C3H2), were detected in a supersonic molecular beam with a Fourier transform microwave spectrometer. Seven a- and four b-type rotational transitions of HC4N and 11 a-type transitions of HC6N, each with resolved nitrogen nuclear quadrupole hyperfine structure, were measured between 6 and 21 GHz, yielding precise values for the three rotational constants, the leading centrifugal distortion constants, and the quadrupole coupling constants. Like the hydrocarbon carbenes C5H2, C7H2, and C9H2, both new molecules have a planar ring-chain structures and singlet electronic ground states. The strongest lines of HC4N can be detected with a signal-to-noise ratio exceeding 10 in a total integration time of less than 1 s, but the lines of HC6N were nearly 100 times weaker.
Keywords
- ISM: molecules, Line: identification, Molecular data, Molecular processes, Radio lines: ISM
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Astronomy and Astrophysics
- Earth and Planetary Sciences(all)
- Space and Planetary Science
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In: Astrophysical Journal, Vol. 513, No. 1 PART 1, 01.03.1999, p. 305-310.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Laboratory detection of the ring-chain carbenes HC4N and HC6N
AU - McCarthy, M. C.
AU - Grabow, J. U.
AU - Travers, M. J.
AU - Chen, W.
AU - Gottlieb, C. A.
AU - Thaddeus, P.
PY - 1999/3/1
Y1 - 1999/3/1
N2 - The highly polar ring-chain carbenes HC4N and HC6N, formed by substituting either CN or CCCN for a hydrogen atom in cyclopropenylidene (C-C3H2), were detected in a supersonic molecular beam with a Fourier transform microwave spectrometer. Seven a- and four b-type rotational transitions of HC4N and 11 a-type transitions of HC6N, each with resolved nitrogen nuclear quadrupole hyperfine structure, were measured between 6 and 21 GHz, yielding precise values for the three rotational constants, the leading centrifugal distortion constants, and the quadrupole coupling constants. Like the hydrocarbon carbenes C5H2, C7H2, and C9H2, both new molecules have a planar ring-chain structures and singlet electronic ground states. The strongest lines of HC4N can be detected with a signal-to-noise ratio exceeding 10 in a total integration time of less than 1 s, but the lines of HC6N were nearly 100 times weaker.
AB - The highly polar ring-chain carbenes HC4N and HC6N, formed by substituting either CN or CCCN for a hydrogen atom in cyclopropenylidene (C-C3H2), were detected in a supersonic molecular beam with a Fourier transform microwave spectrometer. Seven a- and four b-type rotational transitions of HC4N and 11 a-type transitions of HC6N, each with resolved nitrogen nuclear quadrupole hyperfine structure, were measured between 6 and 21 GHz, yielding precise values for the three rotational constants, the leading centrifugal distortion constants, and the quadrupole coupling constants. Like the hydrocarbon carbenes C5H2, C7H2, and C9H2, both new molecules have a planar ring-chain structures and singlet electronic ground states. The strongest lines of HC4N can be detected with a signal-to-noise ratio exceeding 10 in a total integration time of less than 1 s, but the lines of HC6N were nearly 100 times weaker.
KW - ISM: molecules
KW - Line: identification
KW - Molecular data
KW - Molecular processes
KW - Radio lines: ISM
UR - http://www.scopus.com/inward/record.url?scp=0033092541&partnerID=8YFLogxK
U2 - 10.1086/306851
DO - 10.1086/306851
M3 - Article
AN - SCOPUS:0033092541
VL - 513
SP - 305
EP - 310
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1 PART 1
ER -