Journal
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
Volume 6, Issue 6, Pages 1894-1899Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ct100104v
Keywords
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Funding
- NSF [DMR-0906617]
- Research Corporation
- CONICET [PIP 5119/05]
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We investigate the effect of Hartree-Fock range-separation on the calculation of magnetic exchange couplings in a set of nine bimetallic transition-metal complexes containing 3d elements (V, Cr, Mn, and Cu). To this end, we have compared magnetic exchange couplings calculated as self-consistent energy differences using two global hybrid functionals, B3LYP (Becke 3-parameter exchange and Lee-Yang-Parr correlation) and PBEh (hybrid Perdew-Burke-Ernzerhof) with the short-range separated HSE (Heyd-Scuseria-Ernzerhof) and the long-range corrected LC-omega PBE. Our results show that, although there is no clear superiority of any of these functionals when compared with experimental data, the LC-omega PBE provides a better description of the magnetization on the metallic centers, yielding self-consistent solutions that mimic more closely a Heisenberg-like behavior.
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