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- W2012602946 abstract "The ground and ligand field excited states of CrF3−6 have been studied, using different Gaussian basis sets of atomic natural orbitals. Each state was first optimized separately in a complete active space self-consistent field (CASSCF) calculation, including three active electrons in the 2t2g and 4eg shells. Further correlation was then added by using either a singles and doubles configuration interaction approach (SDCI) or by the average coupled pair functional method (ACPF) with the CASSCF configuration space as the reference space. Thereby the number of correlated electrons was raised up to 15. It is shown that the quartet–quartet transitions, corresponding to a 2t2g→4eg excitation, are described already very accurately at the CASSCF level. Further improvement of the 4A2g→4T2g transition was obtained by extending the CI treatment so as to include the F 2p electrons from the 1t2g,3eg, and finally also from the 6a1g shell. For the intraconfigurational t32g quartet–doublet transitions on the other hand, the best results were obtained by an 11 electron CI treatment, including the Cr(III) 3s and 3p electrons." @default.
- W2012602946 created "2016-06-24" @default.
- W2012602946 creator A5003689552 @default.
- W2012602946 creator A5043852315 @default.
- W2012602946 date "1990-09-15" @default.
- W2012602946 modified "2023-10-17" @default.
- W2012602946 title "The ligand field spectrum of the hexafluorochromate (III) anion: An <i>a</i> <i>b</i> <i>i</i> <i>n</i> <i>i</i> <i>t</i> <i>i</i> <i>o</i> study including correlation effects" @default.
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- W2012602946 doi "https://doi.org/10.1063/1.458748" @default.
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