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Methane Activation by 5 d Transition Metals: Energetics, Mechanisms, and Periodic Trends
Author(s) -
Armentrout Peter B.
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201602015
Subject(s) - thermochemistry , dehydrogenation , chemistry , energetics , methane , transition metal , kinetic energy , transition state , mass spectrometry , computational chemistry , thermodynamics , organic chemistry , catalysis , physics , chromatography , quantum mechanics
Abstract Although it has been known for almost three decades that several 5d transition‐metal cations will activate methane at room temperature, a more detailed examination of these reactions across the periodic table has only recently been completed. In this Minireview, we compare and contrast studies of the kinetic energy dependence of these reactions as studied using guided‐ion‐beam tandem mass spectrometry. Thermochemistry for the various products observed (MH + , MH 2 + , MC + , MCH + , MCH 2 + , and MCH 3 + ) are collected and periodic trends evaluated and discussed. The mechanisms for the reactions as elucidated by synergistic quantum chemical calculations are also reviewed. Recent spectroscopic evidence for the structures of the MCH 2 + dehydrogenation products are discussed as well.