Journal
INORGANIC CHEMISTRY
Volume 57, Issue 22, Pages 14097-14105Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.8b01821
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Funding
- Spanish Ministerio de Economia y Competitividad [CTQ2015-64579-C3-1-P, MDM-2017-0767]
- Generalitat de Catalunya
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A systematic study of the performance of several density functional methodologies to study spin crossover (SCO) on first row transition metal complexes is reported. All functionals have been tested against several mononuclear systems containing first row transition metal complexes and exhibiting spin-crossover. Among the tested functionals, the hybrid meta-GGA functional TPSSh with a triple-C basis set including polarization functions on all atoms provides the best results across different metals and oxidation states, and its performance in both predicting the correct ground state and the right energy window for SCO to occur is quite satisfactory. The effect of some additional contributions, such as zero-point energies, relativistic effects, and intramolecular dispersion interactions, has been analyzed. The reported strategy thus expands the use of the TPSSh functional to other metals and oxidation states other than Fell, making it the method of choice to study SCO in first row transition metal complexes. Additionally, the presented results validate the potential use of the TPSSh functional for virtual screening of new molecules with SCO, or its use in the study of the electronic structure of such systems.
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