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Sir, Please explain what is sterioselective reaction and steriospecific reaction?Give some examples?

Sir,


Please explain what is sterioselective reaction and steriospecific reaction?Give some examples?

Grade:11

2 Answers

Vijay Luxmi Askiitiansexpert
357 Points
12 years ago

Stereochemistry, a subdiscipline of chemistry, involves the study of the relative spatial arrangement of atoms

within molecules.

Stereospecific Reaction: A reaction in which the stereochemistry of the reactant completely determines the

stereochemistry of the product without any other option.

Stereoselective Reaction: A reaction in which there is a choice of pathway, but the product stereoisomer is

formed due to its reaction pathway being more favourable than the others available.

Vijay Luxmi Askiitiansexpert
357 Points
12 years ago

Hi Deb,

 

        A reaction in which the stereochemistry (i.e., cis-trans, E – Z or d & L or R & S) of the reactant determines the setereochemistry of the product is called as stereospecific reaction. Ex -> substitution reactions of alkyl halides.

 

        While, if a reaction proceeds such that there is a choice of pathway, but the stereospecific product is formed due to its reaction pathway being move favourable than the others available is called as stereoselective reaction.

 

        Ex -> an internal alkyne of reaction with Na in liquid ammonia always forms trans alkene.


 

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