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jee king king Grade: 12
        

  1. Give the structures  of products of the following reaction:


(C6H5CH2)2Cd + 2 CH3COCl                        



  1. Explain Baeyer-Villiger oxidation in detail

  2. Explain the phenomenon of addition of Alcohols to Aldehydes and Ketones and  the formation and stability of hemi acetals and acetals.


 

7 years ago

Answers : (1)

SAGAR SINGH - IIT DELHI
879 Points
										

Dear student,


Baeyer-Villiger Oxidation



The Baeyer-Villiger Oxidation is the oxidative cleavage of a carbon-carbon bond adjacent to a carbonyl, which converts ketones to esters and cyclic ketones to lactones. The Baeyer-Villiger can be carried out with peracids, such as MCBPA, or with H2O2 and a Lewis acid.


The regiospecificity of the reaction depends on the relative migratory ability of the substituents attached to the carbonyl. Substituents which are able to stabilize a positive charge migrate more readily, so that the order of preference is: tert. alkyl > cyclohexyl > sec. alkyl > phenyl > prim. alkyl > CH3. In some cases, stereoelectronic or ring strain factors also affect the regiochemical outcome.


The reaction of aldehydes preferably gives formates, but sometimes only the liberated alcohol may be isolated due to the solvolytic instability of the product formate under the reaction conditions.


 















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Sagar Singh


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6 years ago
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