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Classification of Reagents

  1. Electrophiles
    Electrophiles are reagents which attack electron-rich centers in the substrate. Examples of electorphiles include (i) positively - charged species, (ii) species which are not actually ions themselves but possess an atom or a center which is electron deficient, and (iii) substrates polarisable functional groups. Electrophiles in general are Lewis acids. Some of the common electrophiles are shown below
  2. Nucleophiles
    Nucleophiles are reagents which are attracted towards electron - deficient centers in the substance. Negatively charged species or natural species containing lone pairs of electrons like water, alcohols, ammonia and amines and all such Lewis bases come under this category. A few common nucleophiles are listed below:

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