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Ashima Chopra Grade: Upto college level
        how do we determine whether a reaction is stereospecific or stereoselective??
7 years ago

Answers : (1)

Pratham Ashish
17 Points
										

Stereoselectivity is the preferential formation in a chemical reaction of one stereoisomer


 over another. When the  product  stereoisomers are enantiomers, the phenomenon is


called enantioselectivity and is quantitatively expressed by the enantiomer excess; when


 they are diastereoisomers, it is called diastereoselectivity and is quantitatively expressed by


 the diastereomer excess



Whereas  stereospecific reactions are those in which diff . stereoisomers of reactant   leads


to diff . stereoisomer s of product .



stereospecificity describes a reaction that necessarily yields a given


 stereoisomer because of the mechanism of the reaction, while stereoselectivity


 describes a reaction where the mechanism allows for the formation of both


 products, but the formation of one of the products is favored. Stereospecificity


 always yields 100% of a particular stereoisomer, while stereoselectivity does


 not necessarily give 100% of the favored isomer

7 years ago
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