Theoretical investigation of the insertion of nickel in the CH bond of CH4 : electronic structure calculations and dynamics

H. Burghgraef, A.P.J. Jansen, R.A. Santen, van

Research output: Contribution to journalArticleAcademicpeer-review

44 Citations (Scopus)
117 Downloads (Pure)

Abstract

The insertion of a nickel atom in the CH bond of CH4 is calculated using density functional theory by determining the transition state and the dissociated state of HNiCH3. A barrier for nickel insertion of 40.7 kJ/mol is found and its origin is discussed. The insertion is exothermic by 34.0 kJ/mol. From the potential energy surface at the transition state and the dissociated state vibrational and rotational frequencies are obtained. Unimolecular and bimolecular transition state theory is used for the calculation of rate constants, sticking coefficients, and activation energies for the nickel insertion reaction as well as the nickel elimination reaction. Activation energies for nickel insertion in both CH4 and CD4 are small compared with other theoretical work. A moderate kinetic isotope effect for the insertion reaction is found when all hydrogens are substituted by deuterium, whereas no significant kinetic isotope effect is found for nickel elimination. Hydrogen tunneling corrections on rate coefficients are also evaluated, but their effect is negligible. Sticking coefficients are small, which is consistent with experimental sticking coefficients of CH4 on nickel surfaces. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.
Original languageEnglish
Pages (from-to)8810-8818
Number of pages9
JournalJournal of Chemical Physics
Volume98
Issue number11
DOIs
Publication statusPublished - 1993

Fingerprint

Dive into the research topics of 'Theoretical investigation of the insertion of nickel in the CH bond of CH4 : electronic structure calculations and dynamics'. Together they form a unique fingerprint.

Cite this