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Characterization, Orbital Description, and Reactivity Patterns of Transition-Metal Oxo Species in the Gas Phase

  • Detlef Schröder
  • Helmut Schwarz
  • Sason Shaik
Chapter
Part of the Structure and Bonding book series (STRUCTURE, volume 97)

Abstract

Metal-oxo and -peroxo species play key roles in catalytic oxidations using transition metals This contribution addresses gas-phase studies of diatomic metal-oxo species and their properties which turn out to be of prime importance for the understanding of the observed reactivity patterns. A second topic concerns higher transition-metal oxides such as di- and trioxides. For these species there exists a structural dichotomy with the corresponding dioxygen complexes, e.g., MO2 ⇆ M(O2). Most of the metal-based oxidations described involve crossings between surfaces of different spin as crucial steps, and the violation of spin conservation is proposed to determine the reactivity of the late transition-metal oxides. The ability of transition metals to mediate surface crossings via spin-orbit coupling is introduced as a key aspect in oxidation catalysis which has as yet not been fully appreciated. It is further outlined how these fundamental properties may relate to the properties of metal-oxo catalysts in the condensed phase.

Keywords

Gas-phase chemistry Metal oxides Oxidation Spin change 

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Copyright information

© Springer Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Detlef Schröder
    • 1
  • Helmut Schwarz
    • 1
  • Sason Shaik
    • 2
  1. 1.Institut für Organische Chemie der Technischen Universität BerlinBerlinGermany
  2. 2.Department of Organic Chemistry and the Lise-Meitner-Minerva Centre for Computational Quantum ChemistryThe Hebrew University of JerusalemJerusalemIsrael

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