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Elimination and ion—molecule reactions of hexamethylethane and trimethylbutane radical cations in ZSM-5

✍ Scribed by Mary V Barnabas; David W. Werst; Alexander D. Trifunac

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 393 KB
Volume: 204
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)89182-h

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✦ Synopsis

Hexamethylethane (HME) and trimethylbutane (TMB) radical cations produced in ZSM-5 zeolite by y radiolysis undergo an elimination process followed by an ion-molecule reaction. The tetramethylethylene radical cation intermediate formed by CH, elimination from TMB+' is observed directly in the temperature range 120-200 K. The deprotonation product, (CHs)sCC' (CHs)s, of the cation-molecule reaction is observed for temperatures > 200 K. The isobutene radical cation formed by elimination of C,H,s from HME+' is not observed-presumably because of rapid ion-molecule reaction to form the 2-methylallyl radical, which is observed.

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