窒素非共有電子対の配向とその物理化学的性質 : 非隣接n, π相互作用系を中心として

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Authors recent studies concerning the structural effects on the lone pair orientation and electronic state of N-heterocyclic molecules were reviewed. Especially, nonadjacent n, π interacting systems were studied in relation to homoallyl and bishomoallyl interactions. It was concluded that n and π electrons are repulsive in bishomoallyl and bishomobenzyl n, π interacting systems, while these electrons are electronically rather attractive in homoallyl and homobenzyl interacting systems, and that the lone pair electrons prefer the orientation in which the interacting system is more stabilized. Along with these studies, various physico-chemical properties of N-heterocyclic compounds were discussed, i.e., <SUP>1</SUP>H and <SUP>13</SUP>C nmr paramagnetic shifts, magnetic anisotropic effect of lone pair electrons, basicities and ionization potentials.
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