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The adsorption of C5H8 on Pt(111) has been studied using a semiempirical theoretical method implemented with the YAeHMOP package. The energetic calculations show that the adsorption is weak. The adsorbate-surface interaction requires that both C-H and Pt-Pt bonds be weaken. The main interaction comes from the C and H nearest to the metal surface. The tilted geometrical configuration adopted by the molecule facilitates this interaction. The Pt-C and Pt-H interactions are mainly due to overlaps between the dz2 and pz metal orbitals and the C pz and H s orbitals, respectively.
Keywords: Alkenes; Adsorption; Platinum; Semi-empirical model; Hydrocarbons; Cyclic intermediates; Catalysis; Petroleum reforming processes
Published Online: 2005-9-7
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