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CBSE Class 12 Chemistry Notes: Aldehydes & Ketones – Chemical Properties

by Neepur Garg
April 22, 2019
in 12th Class, Class Notes
Reading Time: 1min read
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Aldehydes & ketones are highly reactive compounds, they undergo nucleophilic addition reactions. Their reactivity is due to presence of a polar carbonyl group. The positively charged carbon atom of carbonyl group is readily attacked by nucleophilic species for initiation of the reaction. This leads to formation of intermediate anion which further undergoes the attack of H+ ion or other positively charged species to form the final product. The reaction in general may be represented as:

Relative reactivity of aldehydes & ketones

In general ketones are less reactive than aldehydes on a account of following facts:

(i) Electron releasing effect of two alkyl groups, decreases the magnitude of positive charge on ketones.

(ii) Steric effect caused by two alkyl groups also hinders the approach of the nucleophile to the carbonyl carbon.

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Class 12 Chemistry Aldehydes, Ketones and Carboxylic Acids All Topic Notes Class 12 Chemistry All Chapters Notes

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Neepur Garg

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