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Orientation of addition of hydrogen atoms to propylene, butene‐1, and isobutene
Author(s) -
Falconer W. E.,
Sunder W. A.
Publication year - 1971
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550030503
Subject(s) - chemistry , olefin fiber , terminal and nonterminal symbols , hydrogen , hydrogen atom , orientation (vector space) , atom (system on chip) , organic chemistry , catalysis , alkyl , geometry , mathematics , artificial intelligence , computer science , embedded system , rule based machine translation
Abstract The orientation of addition of H atoms to the asymmetric olefins propylene, butene‐1, and isobutene has been determined as a function of atom concentration, olefin concentration, hydrogen pressure, total pressure, and olefin conversion. Conditions have been determined for which complicating secondary processes are believed to be unimportant. The percentage of nonterminal addition is 5.7, 5.7, and 0.48 for propylene, butene‐1, and isobutene, respectively. From these data activation energy differences between nonterminal and terminal addition of 1.7 and 3.2 kcal/mole for the linear olefins and isobutene, respectively, may be calculated. For D atom addition to propylene, a small isotope effect was observed, nonterminal addition being 5.4%. These observations are consistent with a predominantly free radical or electroneutral character for H atoms.