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- W2032797760 abstract "Abstract Various exchange and correlation functionals have been examined in density-functional calculations for obtaining reliable optimized structures for dicationic binuclear ruthenocenes bridged by an unsaturated compound, which has a characteristic fulvene-type structure. First, we have performed extensive calculations for ruthenocene (RuCp2) in D5h symmetry. It has been found that the Ru–Cp optimized distance is linearly correlated with the energy difference between highest occupied a 1 ′ and e 2 ′ orbitals. We have then found that the optimized structure of dicationic binuclear ruthenocenes is strongly dependent of the a 1 ′ – e 2 ′ orbital sequence observed in RuCp2. In particular, when exchange-correlation functionals giving the a 1 ′ e 2 ′ orbital sequence are employed, the contribution of the fulvene-type structure is found to be significantly underestimated in the optimized structure of dicationic binuclear ruthenocenes. We finally demonstrate that the SVWN exchange-correlation functional give reasonable optimized structures comparable to experimental structures determined by X-ray crystallography analysis." @default.
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- W2032797760 date "2007-03-01" @default.
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- W2032797760 title "On the accuracy of density-functional methods for determining structures of dicationic binuclear ruthenocene derivatives bridged by an unsaturated molecule" @default.
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- W2032797760 doi "https://doi.org/10.1016/j.theochem.2006.11.011" @default.
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