EXCITED STATES OF ACETYLENE AND THEIR ROLE IN PYROLYSIS

Autor:	G. J. Minkoff
Rok vydání:	1958
Předmět:	Diradical Induction period Organic Chemistry macromolecular substances General Chemistry Photochemistry Kinetic energy Catalysis chemistry.chemical_compound Acetylene chemistry Polymerization Excited state Dehydrogenation Pyrolysis
Zdroj:	Canadian Journal of Chemistry. 36:131-136
ISSN:	1480-3291 0008-4042
Popis:	Previous theories of acetylene pyrolysis are reviewed in the light of recent work by Minkoff, Newitt, and Rutledge. It is shown that the relatively large rates observed at the beginning of the induction period do not agree with mechanisms involving the intervention of comparatively stable dimers. The required kinetic form is obtained, however, if a triplet diradical is produced on the surface in a bimolecular process, followed by gas phase polymerization, with some chain ending on the surface. The detailed mechanism closely resembles Flory's scheme for liquid phase vinyl polymerization. The shape of the radical is discussed, and it is suggested that the trans-configuration leads to polymerization, while the cis facilitates dehydrogenation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e0304f85cb36ef5d905c395eb5079590 https://doi.org/10.1139/v58-016 Zobrazit plný text záznamu