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- W2064451746 abstract "Except for a few cases, the lowest closed shell SCF solutions for the twisted geometries of polyenes involves delocalized nonpolarized MO’s, and represents a meaningless mixture of radicalar gound state and ionic excited states. Higher (quasi) solutions allow a realistic approach of the polarized ionic states. Orthogonality to the radicalar ground state may be imposed without important loss of energy. Further extensive CI does not modify significantly the situation. These statements are illustrated through ab initio calculations of butadiene and hexatriene. This approach allows us to show that slight distortions stablize polar minima even in ’’homosymmetric’’ molecules such as all-trans hexatriene twisted around the central bond. The existence of polar twisted minima in the ionic singlet excited surfaces of polyenes seems therefore a general phenomenon." @default.
- W2064451746 created "2016-06-24" @default.
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- W2064451746 date "1982-09-01" @default.
- W2064451746 modified "2023-10-18" @default.
- W2064451746 title "General occurrence of polar twisted minima in the ionic singlet excited surfaces of polyenes" @default.
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- W2064451746 doi "https://doi.org/10.1063/1.444118" @default.
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