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Investigation of kinetic and mechanism of triphenylphosphine addition to para ‐naphthoquinone
Author(s) -
NoriShargh Davood,
Soofi Abolfazl,
Farahani Nasrin Saroogh,
Deyhimi Farzad
Publication year - 2005
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.20099
Subject(s) - triphenylphosphine , chemistry , arrhenius equation , dichloromethane , reaction rate constant , kinetic energy , solvent , reaction rate , kinetics , order of reaction , activation energy , photochemistry , organic chemistry , catalysis , physics , quantum mechanics
This work reports the results of a kinetic and mechanistic investigations of the addition reaction of triphenylphosphine to para ‐naphtoquinone in 1,2‐dichloromethane as solvent. The order of reaction with respect to the reactants was determined using initial rate method, and the rate constant was obtained on the basis of pseudo‐first‐order method. Variable time method using Uv–Vis spectrophotometry (at 400 nm) was utilized for monitoring this addition reaction, for which the following Arrhenius equation was obtained:The resulting activation parameters E a , Δ H # , Δ G # , and Δ S # at 300 K were 13.63, 14.42, 18.75 kcal mol −1 , and −14.54 cal mol −1 K −1 , respectively. The results suggest that the reaction is first order with respect to both triphenylphosphine and para ‐naphthoquinone. © 2005 Wiley Periodicals, Inc. Int J Chem Kinet 37: 427–433, 2005