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Gas‐phase elimination reactions of 4‐arylideneimino‐2‐cyanoethyl‐1,2,4‐triazol‐3(2 H )‐ones, their thione analogues and 2‐glucosyl‐1,2,4‐triazole‐3(2 H )‐thiones: a kinetic and mechanistic study
Author(s) -
AlAwadi Nouria A.,
Ibrahim Yehia A.,
Dib Hicham,
Kaul Kamini
Publication year - 2002
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.491
Subject(s) - chemistry , arrhenius equation , reaction rate constant , atmospheric temperature range , thermal decomposition , gas phase , pyrolytic carbon , decomposition , kinetics , triazole , kinetic energy , medicinal chemistry , stereochemistry , pyrolysis , organic chemistry , activation energy , thermodynamics , physics , quantum mechanics
Several 4‐arylidenimino‐2‐cyanoethyl‐1,2,4‐triazol‐3(2 H )‐ones, their 3(2 H )‐thiones and 2‐glucosyl‐1,2,4‐triazol‐3(2 H )‐thiones ( 1–12 ) were synthesized. Selective pyrolytic deprotection of these derivatives was studied in the gas phase and the kinetics of the reactions were measured for each compound. First‐order rate constants measured over a 45 °C temperature range were used to calculate the Arrhenius activation parameters. A comparison of the products and the kinetic behavior of the thermal decomposition of these compounds are discussed. Copyright© 2002 John Wiley & Sons, Ltd.