Journal
CHEMICAL PHYSICS LETTERS
Volume 450, Issue 4-6, Pages 391-395Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2007.11.058
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Funding
- ICREA Funding Source: Custom
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The excitation spectrum of a series of paramagnetic ions in Anderson polyoxometalates ([XMo6O24H6](n-), X = Cr3+, Fe-2+,Fe-3+, Co-2+,Co-3+) is studied. We compare multireference second-order perturbation theory (CASPT2) results with density functional theory calculations. Standard DFT calculations tend to stabilize the low-spin states too much with respect to the high-spin states, whereas time-dependent DFT give a more balanced description of both cases and correctly reproduces the relative energies of the different spin states. (c) 2007 Elsevier B.V. All rights reserved.
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