Spontaneous reactions of electron‐accepting substituted quinodimethane with substituted styrenes: Inductive and steric effects on the formation of a zwitterionic intermediate
Abstract:Spontaneous reactions of an electron-accepting substituted quinodimethane, 1-(2,2-dimethyl-1,3-dioxane-4,6-dione-5-ylidene)-4-(dicyanomethylene)-2,5-cyclohexadiene, with p-substituted, a-substituted, and b-substituted styrenes were investigated. When p-substituted styrenes were used as comonomers, no spontaneous reactions took place for styrenes with an electron-accepting p substituent such as COOMe and CN groups, and both terpolymers and cycloadducts were formed for the other p-substituted styrenes. When a-su… Show more
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