Insertion and σ-bond metathesis reactions of acetylene with (C5H5)2ZrCH3+: all-electron density functional (B3LYP) study
All-electron DFT (B3LYP) calculations with a split-valence basis set of double- and triple-ξ quality have been used to study the reaction paths of the first and second step insertion as well as of the σ-bond metathesis for the reaction of acetylene with (C5H5)2ZrCH3+. Geometry optimizations of the r...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) Festschrift |
| Sprache: | Englisch |
| Veröffentlicht: |
25 August 2000
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| In: |
Journal of molecular catalysis. A, Chemical
Year: 2000, Jahrgang: 160, Heft: 1, Pages: 115-124 |
| DOI: | 10.1016/S1381-1169(00)00238-7 |
| Schlagworte: | |
| Online-Zugang: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1016/S1381-1169(00)00238-7 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S1381116900002387 
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| Verfasserangaben: | Isabella Hyla-Kryspin, Rolf Gleiter |
MARC
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| 245 | 1 | 0 | |a Insertion and σ-bond metathesis reactions of acetylene with (C5H5)2ZrCH3+ |b all-electron density functional (B3LYP) study |c Isabella Hyla-Kryspin, Rolf Gleiter |
| 246 | 3 | 3 | |a Insertion and delta-bond metathesis reactions of acetylene with (C5H5)2ZrCH3+ |
| 264 | 1 | |c 25 August 2000 | |
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| 500 | |a Dedicated to Professor Günter Helmchen on the occasion of his 60th birthday | ||
| 500 | |a Gesehen am 28.10.2020 | ||
| 520 | |a All-electron DFT (B3LYP) calculations with a split-valence basis set of double- and triple-ξ quality have been used to study the reaction paths of the first and second step insertion as well as of the σ-bond metathesis for the reaction of acetylene with (C5H5)2ZrCH3+. Geometry optimizations of the reactants, intermediates, transition states and products were carried out without symmetry constraints. The nature of the particular points on the potential energy surfaces was verified by the analytical calculation of the Hessian matrices. The relative electronic energies are corrected for ZPVE, entropic and thermal contributions, and correspond to the Gibbs free energies (ΔΔG298). It is shown that the propagation step of acetylene polymerization is a facile process from kinetic and thermodynamic point of view, and that the investigated insertion reactions are kinetically and thermodynamically favoured over the σ-bond metathesis reaction. The calculated energetics and structures of either reaction are compared with available theoretical and experimental data of relevant complexes of group III and IV transition metals. | ||
| 650 | 4 | |a Acetylene polymerization | |
| 650 | 4 | |a Cationic zirconocene | |
| 650 | 4 | |a DFT (B3LYP) | |
| 650 | 4 | |a Insertion reaction | |
| 650 | 4 | |a Theoretical study | |
| 650 | 4 | |a σ-Bond metathesis reaction | |
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