Kinetics and mechanism of the CH + N2 reaction. Temperature- and pressure-dependence studies and transition-state-theory analysis

Michael R. Berman*, Ming-Chang Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

122 Scopus citations

Abstract

The reaction CH + N2 → products was studied at 297 K at total pressures between 25 and 787 torr. The second-order reaction rate constant was found to be pressure dependent, varying by a factor of 9.6 in this range. This reaction was also studied in the range 297-675 K at 100-torr total pressure. The rate constant decreases with increasing temperature and cannot be adequately described by a linear fit in this range. Transition-state-RRKM-theory calculations for the reaction proceeding through a long-lived intermediate, HCN2, successfully describe the data. Stabilization of the adduct is the primary reaction channel at lower temperatures while metathesis dominates above 1000 K. These calculations provide a consistent description of these and previous data from flame studies.

Original languageEnglish
Pages (from-to)3933-3942
Number of pages10
JournalJournal of physical chemistry
Volume87
Issue number20
DOIs
StatePublished - 1 Dec 1983

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