Stable π-electron systems and new aromatic structures

摘要: Abstract Aromatic character, as expressed in the reactions of azulene and its derivatives, is correlated with development, appropriate transition state, a stable π-electron system (sextet) five- or seven-membered ring. The recognition that considerable stability associated ions radical derived from perinaphthene leads to formulation several new types hydrocarbons which may be expected show aromatic character. A brief theoretical consideration these given. synthesis carbocyclic heterocyclic derivatives one hydrocarbons, cyclopenta[a]perinaphthene, outlined, detailed account their properties