0

Guest

Courses New

Which is most reactive nucleophile additiona) acetaldehyde b) benzaldehyde c)acetone d) formaldehyde

Which is most reactive nucleophile additiona) acetaldehyde b) benzaldehyde c)acetone d) formaldehyde

Grade:12th pass

3 Answers

Vikas TU
14149 Points
4 years ago
Dear student 
Aromatic carbonyl compounds are less reactive than aliphatic carbonyl groups due to steric factor. Aldehydes are more reactive towards nucleophilic additions reaction than ketones due to the following reasons :
​(i) Inductive effect
(ii) Steric reasons
The carbonyl carbon is electrophilic in nature. greater the positive charge on carbonyl carbon greater is its reactivity towards nucleophilic addition reactions. The alkyl groups exhibit +I effect. More the number of alkyl groups attached to the carbonyl carbon, lesser is the positive charge on the carbon and lesser will be its reactivity towards nucleophilic addition reaction. Also, bulkier groups hinders the approach of nucleophilic reagent, therefore, leading to a decrease in the reactivity of ketones as compared to aldehydes. 
Therefore, the increasing order of nucleophilic addition reaction is :
Benzadehyde
Vikas TU
14149 Points
4 years ago
Dear student 
The reactivity order is 
Benzaldehyde
acetone
acetaldehyde
formaldehyde
, this is reactivity from lower to upper. 
Hope this helps 
Ravleen Kaur
askIITians Faculty 1452 Points
4 years ago
Aliphatic aldehydes are more reactive than aromatic aldehyde because of resonance the electrophilicity decreases.

Ketones are less reactive.

for> ace>Benzal>acetone

Think You Can Provide A Better Answer ?

Other Related Questions on Physical Chemistry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More