Cross-Conjugation in Expanded Systems

Christian Richard Parker and Mogens Br0ndsted Nieisen 

Cross Conjugation Dendralene, Radialene and Fulvene Chemistry, First Edition. 

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In 1982 the present author discovered cyclic orbital interactions in acyclic conjugation, and showed that the orbital phase continuity controls acyclic systems as well as the cyclic systems [23]. The orbital phase theory has thus far expanded and is still expanding the scope of its applications. Among some typical examples are included relative stabilities of cross vs linear polyenes and conjugated diradicals in the singlet and triplet states, spin preference of diradicals, regioselectivities, conformational stabilities, acute coordination angle in metal complexes, and so on. 

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