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DFT calculations in periodic boundary conditions of gas-phase acidities and of transition-metal anionic clusters: case study with carboxylate-stabilized ruthenium clusters.
- Source :
-
Theoretical Chemistry Accounts: Theory, Computation, & Modeling . Aug2019, Vol. 138 Issue 8, pN.PAG-N.PAG. 1p. - Publication Year :
- 2019
-
Abstract
- The first part of this study aims at evaluating the accuracy of DFT calculations of acids and their conjugate bases in periodic boundary conditions and plane-wave basis sets. The resulting gas-phase acidities are compared to experimental data. Calculations done with the PBE functional are accurate, with a ∼ 4 kcal mol - 1 mean average deviation (MAD) with respect to experiments and a ∼ 1 kcal mol - 1 MAD with respect to non-periodic DFT calculations done in the aug-cc-pvtz basis set with the same functional. In the second part, the relative stability of Ru 13 - isomers is also successfully compared to previous calculations done using local basis sets (Waldt et al. in J Chem Phys 142:024319, 2015). Finally, several carboxylic acids and their conjugate bases are adsorbed on two Ru 13 clusters, showing a linear correlation between adsorption energies and experimental gas-phase acidities. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RUTHENIUM
*ACIDITY
*CARBOXYLIC acids
*CASE studies
*ISOMERS
Subjects
Details
- Language :
- English
- ISSN :
- 1432881X
- Volume :
- 138
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Theoretical Chemistry Accounts: Theory, Computation, & Modeling
- Publication Type :
- Academic Journal
- Accession number :
- 138201411
- Full Text :
- https://doi.org/10.1007/s00214-019-2484-4