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[chemical review]Reactivity Theory of Zeolitic Bronsted Acidic Sites
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R. A. van Santen* Schuit lnstitute of Catalysis, Faculty of Chemical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands G. J. Kramer Shell Research b. v., Koninkijke/Shell-Laboratorium, Amsterdam, The Netherlands Contents I. General Introduction 637 II. The Bronsted Acidic Hydroxyl 639 A. Background 639 B. Quantum-Chemical Cluster Calculations 640 C. Vibrational Spectroscopy of the Zeolitic OH Group 642 Ill. Lattice Stability and Proton Affinity 644 A. Introduction 644 B. Lattice Stability 645 C. Deprotonation Energies 646 IV. Hydrogen Bonding versus Zwitterion Formation 647 A. Background 647 B. Zwitterion Formation 647 C. Vibrational Dynamics of the Disturbed Zeolitic 649 Hydroxyl D. Solid Acid BronstedA cidity 652 V. Ionic Intermediate versus Transition State 652 Formation A. Background 652 B. The CH5+ Carbonium Ion, CH30H2+, and 653 C. The Activation of Hydrocarbons 656 IV. Conclusion 657 [ Last edited by rabbit7708 on 2007-3-25 at 21:16 ] |
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