Stereoselective and Stereospecific Reaction SEM IV POC III

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Stereoselective and Stereospecific Reaction SEM IV POC III

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Slide1:

STEREOSPECIFICITY & STEREOSELECTIVITY STEREOSPECIFICITY & STEREOSELECTIVITY Explanation by Dr. Atul R. Bendale Definition Concept Selective specific example follow

Slide2:

Definition Concept Selective specific example follow STEREO SPECIFIC In a stereospecific reaction, one stereoisomer of the reactant gives one stereoisomer of the product, while a different stereoisomer of the reactant gives a different stereoisomer of the product (like in SN2) STEREO SELECTIVE A stereoselective reaction is one in which a single reactant can give two or more stereoisomeric products, and one or more of these products is preferred over the others – even if the preference is very small (minor product).

Slide3:

Definition Concept Selective specific example follow Stereoselective 2 Stereospecific 1 Stereoselective 2 Two products One is major, other is minor One product Depend upon stereochemistry of reactant has 2 sub classes 1. entaioselective 2. distereoselecive

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Definition Concept Selective specific example follow 01 02 01 So Bromine Is added From LEFT hand side So bromine Is added from RIGHT hand side 02 Br2 Br2 In above structure Chlorine is At LEFT hand side In above structure Chlorine is Present at RIGHT hand side The point of attachment of bromine is depend upon Position of chlorine group Therefore it is streospecific reaction

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Definition Concept Selective specific example follow STEREO SELECTIVE Following 4 examples shows stereo selectivity STEREO SPECIFIC Following 3 examples shows stereo specificity

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Definition Concept Selective specific example follow Chemistry blog www.atulbendale.wordpress.com Chemistry classes atulbendale.classroom.google.com Chemistry ICT atulchemistry.gnomio.com

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