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The elimination kinetics of secondary Alkyl Bromides in the gas phase
Author(s) -
Chuchani Gabriel,
Martín Ignacio,
Rotinov Alexandra,
Domínguez Rosa M.
Publication year - 1990
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.550221204
Subject(s) - chemistry , arrhenius equation , cyclohexene , alkyl , kinetics , olefin fiber , torr , gas phase , reaction rate constant , atmospheric temperature range , medicinal chemistry , homogeneous , thermodynamics , activation energy , organic chemistry , catalysis , physics , quantum mechanics
Elimination kinetics of 2‐bromohexane and 2‐bromo‐4‐methylpentane in the gas phase were examined over the temperature range of 310–360°C and pressure range of 46–213 torr. The reactionsin seasoned, static reaction vessels, and in the presence of the free radical inhibitor cyclohexene, are homogeneous, unimolecular, and follow first order rate laws. The overall rate coefficients are described by the following Arrhenius equations: For 2‐bromohexane, log 1 (s −1 ) = (13.08 ± 0.70) − (185.7 ± 8.2) kJ mol −1 (2.303 RT ) −1 ; for 2‐bromo‐4‐methylpentane, log 1 (s −1 ) = (13.08 ± 0.33) − (183.4 ± 3.8) kJ mol −1 (2.303 RT ) −1 . The electron releasing effect of alkyl groups influences the overall elimination rates. The olefin products isomerize in the presence of HBr gas until an equilibrium mixture is reached.