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- W4238049761 endingPage "235" @default.
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- W4238049761 abstract "Conjugation through continuously connected extended π-arrays is well-known to provide long-range electronic communication. A number of extended hyperconjugation patterns have been shown to be effective as well. Long-range delocalization can follow a variety of patterns that combine conjugation and hyperconjugation and are mediated by through-bond (TB) and through-space (TS) interactions. Homoconjugation and homohyperconjugation are observed when a saturated center intervenes between donor and acceptor orbitals. Homoaromaticity is well-established in charged systems and can involve either a planar or a three-dimensional array of atoms. Cross-hyperconjugation results from the delocalization of π-electrons into the pseudo-π* orbitals, acting effectively as a cross-conjugated system. Through-bond interactions can evolve into concerted fragmentation. Symmetry effects in cyclic systems can lead to enhancing or weakening of hyperconjugation and conjugation, leading to σ-aromatic or antiaromatic systems. Independent arrays of delocalizing interactions can exist in a molecule. For example, formation of a σ-aromatic system in the presence of an orthogonal aromatic π-system leads to double aromaticity." @default.
- W4238049761 created "2022-05-12" @default.
- W4238049761 date "2016-08-26" @default.
- W4238049761 modified "2023-09-23" @default.
- W4238049761 title "Remote Stereoelectronic Effects" @default.
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- W4238049761 doi "https://doi.org/10.1002/9781118906378.ch8" @default.
- W4238049761 hasPublicationYear "2016" @default.