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Topic: Cyanoacetylene

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	Laboratory Astrochemistry, Robert Kolos
		Cyanoacetylene, H-C≡C-C≡N (molecule 1 in the Figure above), found in the dense clouds of interstellar matter, and in some evolved circumstellar shells, is the archetype for a family of cyanopolyacetylenes, and for a multitude of related isomers, radicals, and ions.
		It seemed important to extend the studies of cyanoacetylene isomers into complementary spectral regions, especially IR, to look for additional data on molecular structures, and to broaden the possibilities of astronomical observations.
		For example, we found that irradiations with UV quanta, energetic enough to cleave single bonds in the cyanoacetylene molecule, invariably lead to the isonitrile (2) formation, that is to the 180 degree rotation of the cyano group -CN
	malina.ichf.edu.pl /zd-9/RESUME.htm (791 words)

	New Precursor Polymers to Highly Conducting Materials (Site not responding. Last check: 2007-10-23)
		Polymers of cyanoacetylene have been reported, but little information is available about their molecular weight or microstructure.
		First, in its trans-transoid microstructure, it is poised to cyclize to an aromatic ladder polymer very similar in structure to poly(acene).
		We feel that previous reports of poly(cyanoacetylene) are only of oligomeric materials of reduced conjugation and that, using nickel salts, we have prepared the first true polymer of cyanoacetylene.
	www.ncsu.edu /chemistry/cbg/Research/Graphitic/graphitic2.html (372 words)

	ACTA (Site not responding. Last check: 2007-10-23)
		The weakly bound van der Waals dimer between a molecule of cyanoacetylene and an argon atom was observed by rotational spectroscopy of supersonic expansion.
		Cyanoacetylene was generated in situ from vinyl cyanide precursor by means of a high voltage discharge just downstream of the expansion nozzle.
		=3.65 A and θ=94.9°, with the Ar atom shifted from the position above the cyanoacetylene centre of mass in the direction of the CN group.
	przyrbwn.icm.edu.pl /APP/ABSTR/104/a104-5-415.html (126 words)

	Origin of Life: Instability of Building Blocks
		He pointed out that both cyanoacetylene and cyanoacetaldehyde are produced in spark discharge experiments with an unlikely methane/nitrogen (CH) mixture.
		Furthermore, cyanoacetylene and cyanoacetaldehyde would undergo side reactions with other nucleophiles rather than produce cytosine.
		For example, cyanoacetylene and cyanoacetaldehyde both react with the amino group, which would destroy any prebiotic amino acids.
	www.trueorigin.org /originoflife.asp (2583 words)

	[46.02] Aromatic Ring Forming Reactions of Cyanoacetylene and Diacetylene. Applications to Titan's Atmosphere (Site not responding. Last check: 2007-10-23)
		Diacetylene and cyanoacetylene are the largest hydrocarbon and nitrile yet identified on Titan.
		In similar experiments with cyanoacetylene this group will present data which indicates the formation of cyanobenzene and phenylacetylene.
		These reactions are important in developing a further understanding of the chemical processes which may lead to the formation of the visible absorbing haze on Titan.
	protostar.aas.org /publications/baas/v30n3/dps98/478.htm (125 words)

	Titan (moon) - InfoSearchPoint.com (Site not responding. Last check: 2007-10-23)
		Recent radar measurements from Earth suggest that there is no large-scale ocean of ethane on Titan, but it may still be present in smaller lakes.
		The atmosphere is 94% nitrogen with significant traces of various hydrocarbons making up much of the remainder (including methane, ethane, diacetylene, methylacetylene, cyanoacetylene, acetylene, propane, and also carbon dioxide, cyanogen, hydrogen cyanide, and helium).
		These hydrocarbons are thought to form in Titan's upper atmosphere in reactions resulting from the breakup of methane by the Sun's ultraviolet light, producing a thick orange smog, and Titan's surface may be coated in a tar-like layer of organic precipitate.
	www.infosearchpoint.com /display/Titan_(moon) (503 words)

	The mission (Site not responding. Last check: 2007-10-23)
		Early models of interstellar cloud chemistry suggest ion - molecule reactions together with a dissociative recombination as a possible source to form the simplest member of this class, cyanoacetylene.
		), might produce cyanoacetylene in the outflow of the circumstellar envelope surrounding the carbon star IRC+10216, hot molecular cores, and dark molecular clouds such as TMC-1.
		Recent laboratory measurements at ultralow temperatures as low as 20 K show that the reaction rate constant of this reaction increases as the temperature decreases, reaching a maximum of 5
	www.chem.hawaii.edu /Bil301/mission/mission4.htm (249 words)

	[45.29] Detection of Cyanoacetylene on Titan During Southern Summer Near the Epoch of the Huygens Probe Descent (Site not responding. Last check: 2007-10-23)
		The first ground-based detection of Titan's cyanoacetylene was reported by Bezard et al.
		We report the first ground-based observations of Titan's cyanoacetylene obtained in the mid-IR.
		We will compare the column abundance of cyanoacetylene with previous measurements at different subsolar and subearth latitudes and comment on the differences.
	www.aas.org /publications/baas/v37n3/dps2005/808.htm (305 words)

	Articles - Titan (moon) (Site not responding. Last check: 2007-10-23)
		The haze that can be seen in the picture to the left contributes to the moon´s Anti-Greenhouse Effect and lowers the temperature by reflecting sunlight away from the satellite.
		The atmosphere is 98.4% nitrogen — the only dense nitrogen-rich atmosphere in the solar system aside from our own — with the remaining 1.6% composed of methane and only trace amounts of other gases such as hydrocarbons (including ethane, diacetylene, methylacetylene, cyanoacetylene, acetylene, propane), argon, carbon dioxide, carbon monoxide, cyanogen, hydrogen cyanide and helium.
		The hydrocarbons are thought to form in Titan´s upper atmosphere in reactions resulting from the breakup of methane by the Sun´s ultraviolet light, producing a thick orange smog.
	www.zdiamond.net /articles/Titan_(moon) (2997 words)

	Prebiotic cytosine synthesis: A critical analysis and implications for the origin of life -- Shapiro 96 (8): 4396 -- ...
		An extensive solution chemistry for cyanoacetylene with simple nucleophiles has been recorded.
		(23), react rapidly at room temperature or lower with cyanoacetylene.
		In certain cases, e.g., the reaction of cyanoacetylene with phosphate,
	www.pnas.org /cgi/content/full/96/8/4396 (5028 words)

	NMR \| NMR
		Simon and R. Vold, Proton relaxation and molecular motion in binary liquid mixtures, Journal of Magnetic Resonance 24, 399 (1976).
		Szeverenyi, R. Vold, and R. Vold, Molecular reorientation of cyanoacetylene in hydrocarbon solutions, Chemical Physics 18, 31 (1976).
		Szeverenyi, R. Vold, and R. Vold, Mechanisms of nuclear magnetic relaxation in cyanoacetylene, Chemical Physics 18, 23 (1976).
	www.wm.edu /nmr/Publications.php (3150 words)

	Origin of life: instability of building blocks - Journal of Creation (TJ)
		although one should not count on this as a reliable source of cyanoacetaldehyde because cyanoacetylene would more likely be destroyed by other reactions.
		And cyanoacetaldehyde, while more stable than cyanoacetylene, is still quite quickly hydrolyzed (t
		They rightly disagreed with a previous suggested synthesis of cytosine from cyanoacetylene and cyanate (OCN
	www.creationontheweb.com /content/view/1618 (2585 words)

	[No title]
		Positions and intensities of the fundamental bands of cyanoacetylene (HC Absolute Intensities (atm
		Uyemura, M., Maeda, S., The Infrared intensities of stretching fundamentals in gaseous and crystalline cyanoacetylene.
		Khlifi, M., F. Raulin, and M. Dang-Nhu, Integrated band intensity versus temperature for the n1, n2, n5, and n6 bands of cyanoacetylene.
	www.lisa.univ-paris12.fr /GPCOS/SCOOPweb/intIRHC3N.htm (111 words)

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