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- W2076729345 abstract "Abstract Eight kinds of density functionals named B3LYP, PBE1PBE, B1B95, BLYP, BP86, G96PW91, mPWPW91, and SVWN along with two different valence basis sets (LANL2DZ and CEP‐121g) are employed to study the transition‐metal dimers for the elements of group VIII. By comparing the equilibrium bond distances, vibrational frequencies, and dissociation energies of the ground state of these dimers with the available experimental values and theoretical data, we show that the “pure” DFT methods (G96PW91, BLYP, and BP86) with great‐gradient approximation always give better results relative to the hybrid HF/DFT schemes (B3LYP, PBE1PBE, and B1B95). The striking case found by us is that the G96PW91 functional, which is not tested in previous systemic studies, always predicts the dissociation energy to be well. The Ru 2 and Os 2 dimers are sensitive to not only the functionals employed but also the valence basis sets adopted. The natural bond orbital population is analyzed, and the molecular orbitals of the unpaired electrons are determined. Furthermore, our results indicate that the s and d orbitals of these dimers always hybridize with each other except for Rh 2 and Pt 2 molecules. And by analyzing the electron configuration of the bonding atom, the dissociation limit of the ground state is obtained. © 2008 Wiley Periodicals, Inc. Int J Quantum Chem, 2008" @default.
- W2076729345 created "2016-06-24" @default.
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- W2076729345 date "2008-01-01" @default.
- W2076729345 modified "2023-10-17" @default.
- W2076729345 title "The confirmation of accurate combination of functional and basis set for transition‐metal dimers: Fe<sub>2</sub>, Co<sub>2</sub>, Ni<sub>2</sub>, Ru<sub>2</sub>, Rh<sub>2</sub>, Pd<sub>2</sub>, Os<sub>2</sub>, Ir<sub>2</sub>, and Pt<sub>2</sub>" @default.
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- W2076729345 doi "https://doi.org/10.1002/qua.21684" @default.
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