The order of reactivity of phenyl magnesium bromide
(PhMgBr) with the following compounds
CH₃ CH₃ Ph
C=O, C=O and C=O
H CH₃ Ph
I II III
(a) III > II > I (b) II > I > III
(c) I > III > II (d) I > II > III
Answers
Answered by
1
The order of reactivity of phenyl magnesium bromide with the compund are
*option;(d) is correct
• Though alkyl group has + I effect , because greater the number of alkyl attached to the carbonyl group.
*The reactivity towards nucleophilic addition reaction decreases.
*As the carbonyl group increases, the reactivity of the group decreases .
Answered by
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CH3CHO is the most reactive towards nucleophilic addition.
Explanation:
- Nucleophilic addition is the reaction between two compounds where there is a electropositive centre in the reactant where the electron rich reagent can attack and get added.
- Nucleophilic addition is mostly seen in carbonyl compounds because the oxygen is a very electronegative element and it can cause shift of electron cloud from the carbon to oxygen.
- This leads to the partially positive charge in carbon atom.
- In case of carbonyls, there are Aldehydes and ketones, both alkyl and aryl.
- The alkyl groups have inductive effect on the keto group and the aryl group has +R effect on the carbonyl group.
- +R effect is more significant than +I effect.
- So here in option A, there is 1 alkyl group and on other side there's a hydrogen.
- In the rest of the compounds, there are either 2 alkyl groups, 2 aryl groups or their mixture.
- So ethanal will be most effective towards nucleophilic addition.
For more information about nucleophilic addition,
brainly.in/question/6663951
Why alkynes are more reactive than alkenes for nucleophilic addition reaction?
brainly.in/question/4891848
Explain why aldehydes undergo nucleophilic addition more readily than ketones.
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