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Simun Mishra posted an Question

July 19, 2020 • 15:30 pm

30 points

IIT JAM
Chemistry (CY)

What is captodative effect ?

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Priyanshu kumar

See this ...both EWG and EDG have a stabilising effect on a radical intermediate...This is called captodative effect
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check this..it helps simun
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Any doubt then please ask??
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Suman Kumar Best Answer

The captodative effect is the stabilization of radicals by a synergistic effect of an electron-withdrawing substituent and an electron-donating substituent.[
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When EDGs and EWGs are near the radical center, the stability of the radical center increases.[1] The substituents can kinetically stabilize radical centers by preventing molecules and other radical centers from reacting with the center.[3] The substituents thermodynamically stabilize the center by delocalizing the radical ion via resonance.
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These stabilization mechanisms lead to an enhanced rate for free-radical reactions
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See this
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Dinesh khalmaniya 1

Both electron withdrawing and Electron donating groups increase the stability of free radical so it is known as captodative effect
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How can 2 groups act simultaneously sir ....
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you have to go in deep to understand this concept
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sir can u pls explain it properly how can it occur
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wait..
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ok sir
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check it
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in both the case stability increase in case of free radical
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got it??
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no sir
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wait I'm explaing
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ok sir
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see this picture actually ERG donates 3e . 2 electron goes in low elergy level while 1 electron goes into high energy leve . so overe all potential energy of lower energy will be high.. that mean energy will decrease and stability increase
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same case in EWG. in this case free radical have only one e which is in low energy state so energy decrease and stability increase
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got it?
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no
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no sir ..
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okay Simum😊
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