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Radical processes in the pyrolysis of acetylene

✍ Scribed by John H. Kiefer

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
314 KB
Volume
25
Category
Article
ISSN
0538-8066

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✦ Synopsis

This comment refers to the recent article of this title by S. W. Benson [ll, in which he returns to an H-atom chain mechanism for the low-temperature acetylene pyrolysis. That article contains a fairly complete chain mechanism and a critique of the alternative molecular (vinylidene) scheme proposed by Colussi and by Kiefer, with their co-workers [a-91, and also by Merkulov et al. [lo]. The purpose of this comment is to point out that this chain mechanism still has serious problems, and t o reply to some of Benson's comments on the vinylidene path.

The main problem with all radical chain schemes for CzHz pyrolysis is initiation, and the formation of the initial product, vinylacetylene (VA). For initiation Benson offers H H C-C HC

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