Detail of "16165-40-5"

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Cyclo-C9H8, -C7H6, and -C5H4: are they allenes, carbenes, or onium anions or carbanion cations?

Cyclo-C9H8, -C7H6, and -C5H4: are they allenes, carbenes, or onium anions or carbanion cations?. Glidewell, Christopher; Lloyd, Douglas (Dep. Chem., Univ. St. Andrews, St. Andrews KY16 9ST, UK). J. Chem. Res., Synop., (7), 178-9 (English) 1983. CODEN: JRPSDC. 4729-01-5 and 16165-40-5 which are cas registry numbers of chemicals are mentioned. ISSN: 0308-2342. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Section cross-reference(s): 24 MNDO MO calcns. on cyclo-C9H8, -C7H6, -C5H4, and -C3H2 showed them to have the structures I-IV, resp. The allene structure is only possible when the ring contains 37 C atoms, owing to strain in smaller rings. .

Laboratory and astronomical spectroscopy of cyclopropenylidene (C3H2), the first interstellar organic ring

Laboratory and astronomical spectroscopy of cyclopropenylidene (C3H2), the first interstellar organic ring. Vrtilek, J. M.; Gottlieb, C. A.In this study，16165-40-5 is also used.; Thaddeus, P. (Goddard Inst. Space Stud., USA). Astrophys. J., 314(2, Pt. 1), 716-25 (English) 1987. CODEN: ASJOAB. ISSN: 0004-637X. DOCUMENT TYPE: Journal CA Section: 73 (Optical, Electron, and Mass Spectroscopy and Other Related Properties) Section cross-reference(s): 22 Lab. and astronomical observations of C3H2 are described. In the lab., 22 mm-wave lines were measured in a He and C2H2 discharge. From these the 3 rotational consts. and 5 4th-order centrifugal distortion consts. of C3H2 were detd. to high precision, allowing, in turn, calcn. to 0.1 km s-1 of the most important lines in the radio and far-IR spectrum; 123 lines in the rotational spectrum with E/k < 100 K were tabulated. Eleven astronomical transitions were identified, and in Sagittarii B2 and Orion KL, rotational temps. and column densities were derived and compared with those of other hydrocarbons with a similar no. of C atoms. Owing to the ubiquity in space of its strongest low-lying transitions, C3H2 promises to be a generally useful mol. probe; it may be of a new class of ring mols. in space. Detection of a carbene ring in an He and C2H2 discharge suggests searches for other hydrocarbon rings and cyclopropenylidene derivs. .