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When substituted benzene compounds undergo electrophilic substitution reactions two related features must be considered: * The first is the relative reactivity of the compound compared with benzene itself. Experiments have shown that substituents on a benzene ring can influence reactivity in a profound manner. For example, a hydroxy or methoxy substituent increases the rate of electrophilic substitution about ten thousand fold, as illustrated by the case of anisole in the virtual demonstration (above). In contrast, a nitro substituent decreases the ring's reactivity by roughly a million. This activation or deactivation of the benzene ring toward electrophil
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submitted by magiclko (4210 m) on 3 Mar 2007 14:16:00 IST (5 comments 765 views)
