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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Chemistry (CY)
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please answer my question as soon as possible ...........
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Priyanshu kumar Best Answer
Hydrocyanation of unsaturated carbonyl compounds is a special case of the Michael reaction which can lead to β-cyanoketones, β-cyano-cyanohydrins, or vinyl cyanohydrins. The distribution of products from conjugative hydrocyanation depends both on substrate structure and reaction conditions. Generally, however, acidic conditions favor 1,2-adducts, while basic conditions favor 1,4-adducts. As a result, under acidic conditions the cyanohydrins 2 and 4 are favored over the 1,4-adduct 3. Conditions of kinetic control also favor 1,2-adducts, while conditions of thermodynamic control favor the 1,4-adduct. Conducting the reaction at high temperatures under basic conditions thus facilitates formation of the conjugate addition product. Additions of alkali metal cyanides, for instance, lead exclusively to 1,4-addition.
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Dinesh khalmaniya 1![best-answer]()
Low temperature pr direct addition/1,2 addition hoga jbki high temperature pr 1,4 addition or Micheal addition hota he
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