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Kinetics of NCO + hydrocarbon reactions

✍ Scribed by Joonbum Park; John F. Hershberger

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
629 KB
Volume
218
Category
Article
ISSN
0009-2614

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✦ Synopsis

The kinetics of NC0 reactions with hydrocarbon molecules were investigated using time-resolved infrared diode laser absorption spectroscopy. NC0 was probed at 1905.6 cm-', and HNCO reaction products were probed at 2280.1 cm-'. Rate constants at 296 K were measured to be <1.0x10-r4, (7.04f1.20)x10-'4, (2.29f0.13)~10-r3, (6.13f0.32)~10-", (8.78f0.42)~ lo-", (7.47*0.8)x lo-r4, and (2.85f0.22) x lo-" cm3 molecule-' s-r, for CH4, C2H6, C3Hs, n-C.,H,,,, n-CSHL2, C2H2, and C2H4, respectively. Hydrogen abstraction to form HNCO was observed to be a major product channel for reactions with alkanes and for C2H2. For C2H2, HNCO is formed in negligible yield, indicating that addition-elimination is the primary mechanism active.

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