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  • 2000-2004  (1)
  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 8233-8240 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A detailed investigation on the π-electronic ground and lowest excited g- and u-symmetrical singlet and triplet states of icosahedral C60 is performed in the framework of the semiempirical Hubbard model using single and double excited configuration interaction (SDCI) upon an appropriately chosen reference space constructed out of Hartree–Fock-type molecular orbitals. We present SDCI results for energies, wave-function symmetries, bond orders and spin–spin correlations for these states. For the ground state, second order Møller–Plesset (MP2) and size-consistency corrected energies are presented and compared with Monte Carlo results. We also examine the influence of bond length alternation on the calculated properties. It is shown that within the Hubbard model the lowest excited g and u singlet and triplet states of C60 give very similar overall bond orders and spin–spin correlations. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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