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Reaction rates of the CN radical with diacetylene and dicyanoacetylene

✍ Scribed by Kanekazu Seki; Mikio Yagi; Maoqi He; Joshua B. Halpern; Hideo Okabe

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 367 KB
Volume: 258
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(96)00697-5

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✦ Synopsis

Rates of CN reactions with diacetylene (DA) and dicyanoacetylene (DCA) have been measured at room temperature from the decay of the CN radical at various sample pressures by laser induced fluorescence. The rate constants are (4.2 + 0.2) × I0 l0 and (5.4_ 0.2)× 10-13 in units of cm 3 molec-t s-l for DA and DCA, respectively, which follow the general pattern of CN reactions with hydrocarbons and nitriles. In the lower temperature circumstellar envelopes and Titan's atmosphere, the CN reaction with Call 2 may be more important, while the reaction with C4N 2 may become less important.

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