Discuss reactivity of ketone and aldehydes?
Answers
Answered by
0
Relative reactivity
Ketones are somewhat less reactive than aldehydes towards nucleophiles .
There are two main reasons for this reactivity difference .
1▪ Steric hindrance :-
The carbonyl carbon is more crowded in ketones as compared to aldehydes . In nucleophiles addition , the attached groups come even closer because in the product the hybridization changes from sp2 to sp3 and the bond angles decrease from 120° to 109.5° .
2▪Electronic Effect : -
As alkyl groups are usually electron donating groups compared to hydrogen . They , therefore , tend to neutralize the positive charge on the carbonyl carbon decreasing its reactivity towards nucleophile . Ketones have two alkyl groups , aldehyde has only one .
Ketones are somewhat less reactive than aldehydes towards nucleophiles .
There are two main reasons for this reactivity difference .
1▪ Steric hindrance :-
The carbonyl carbon is more crowded in ketones as compared to aldehydes . In nucleophiles addition , the attached groups come even closer because in the product the hybridization changes from sp2 to sp3 and the bond angles decrease from 120° to 109.5° .
2▪Electronic Effect : -
As alkyl groups are usually electron donating groups compared to hydrogen . They , therefore , tend to neutralize the positive charge on the carbonyl carbon decreasing its reactivity towards nucleophile . Ketones have two alkyl groups , aldehyde has only one .
Attachments:
Similar questions