Sir, Explain me What is regioslectivity and regio selective reaction? with examples.

Dear Deb,

A regioselective is the preferanc e of one direction of bond making or breaking over all other possible directions.

A regioselective reaction is one in which one direction of bond making or

breaking occurs preferentially over all other possible directions. Reactions

are termed completely (100%) regioselective if the discrimination is com-

plete, or partially (x%), if the product of reaction at one site predominates

over the product of reaction at other sites.

Thank you.