Answers

2015-12-23T08:41:30+05:30
Nucleophiles - it is a chemical specie that donates an electron pair to an electrophile to form a chemical bond in relation to a reaction.
  
electrophile - it is a reagent attracted to electrons.
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2015-12-24T14:56:41+05:30
Nucleophiles is of two types neutral nucleophile and negative nucleophile.
it is electron rich species and has more electron density . it involves in the nucleophilic substitution reaction.
electrophiles is electron deficient species and has less electron density. it involves electrophilic substitution reaction.

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