Potenttal energy curves of fluorine and mtrogen molecules and of ethylene have been calculated by the approximately projected unrestricted Hat-tree-Fock (APUHF) and Moper-Plesset nth-order perturbation ( APUMPn) methods. The correlation corrections for a symmetrically dissociating water molecule wer
The ene reaction: Comparison of results of Hartree-Fock, Møller-Plesset, CASSCF, and DFT calculations
✍ Scribed by Julianto Pranata
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 139 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0020-7608
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✦ Synopsis
Structural and energetic aspects of the ene reaction were investigated using a variety of computational methods incorporating different ways of accounting for electron correlation. Compared to the noncorrelated Hartree᎐Fock method, opposing trends were observed in the geometry of the transition state when using the Complete Ž . Active Space-Self Consistent Field CASSCF method versus Møller᎐Plesset and density Ž . functional theory DFT methods. For reproducing experimental results, both Møller᎐ Plesset and DFT methods appear to be successful, while the CASSCF method failed to reproduce the experimental energy changes.
📜 SIMILAR VOLUMES
A number of hydrogen-bond related quantities-geometries, interaction energies, dipole moments, dipole moment derivatives, and harmonic vibrational frequencies-were calculated at the Hartree-Fock, MP2, and different DFT levels for the HCN dimer and the periodic HCN crystal. The crystal calculations w