The polarity of the carbon-halogen bond is responsible for the nucleophilic substitution reactions of alkyl halides which mostly occur by S_(N)1 and S_(N)2 mechanisms. The rates of S_(N)2 reactions among other things are governed by steric factors while than of S_(N)1 reactions are governed by the stability of intermediate carbocations. chirality has a profound role in undersetanding the mechanism of S_(N)1 and S_(N)2 reactions. whereas S_(N)2 reactions of chiral alkyl halides are accompanied by inversion of configuration, S_(N)1 reactions are characterised by racemisation. Q. Which of the following is an example of S_(N)2 reaction?

The polarity of the carbon-halogen bond is responsible for the nucleop

1.	The polarity of the carbon-halogen bond is responsible for the nucleophilic substitution reactions of alkyl halides which mostly occur by S_(N)1 and S_(N)2 mechanisms. The rates of S_(N)2 reactions among other things are governed by steric factors while than of S_(N)1 reactions are governed by the stability of intermediate carbocations. chirality has a profound role in undersetanding the mechanism of S_(N)1 and S_(N)2 reactions. whereas S_(N)2 reactions of chiral alkyl halides are accompanied by inversion of configuration, S_(N)1 reactions are characterised by racemisation. Q. Which of the following is an example of S_(N)2 reaction?
Answer» `CH_(3)Br+OH^(-)toCH_(3)OH+Br^(-)` `(CH_(3))_(2)CHBr+OH^(-)(CH_(3))_(2)CHOH+Br^(-)` `CH_(3)CH_(2)OH OVERSET(-H_(2)O)to CH_(2)=CH_(2)` `CH_(3)CH_(2)OH overset(-H_(2)O)to CH_(2)=CH_(2)` Answer :A