Vicarious nucleophilic substitution (VNS) of hydrogen is a new type of reaction which is differ-ent from the usual electrophilic and nucleophilic reactions of the nitro arenes.

• 氢的替代亲核取代反应(VNS)是与硝基芳环的亲电反应、亲核反应不同的一种新反应.；将VNS与硝基芳环的亲电反应、亲核反应做比较；阐述了VNS的定义;