Question 12.10 Explain why alkyl groups act as electron donors when attached to a π system.
Class XI Organic Chemistry : Some Basic Principles and Techniques Page 362
Class XI Organic Chemistry : Some Basic Principles and Techniques Page 362
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Basically, electron donor means the species who donates own pair of electrons to other species or atoms. here if we talk about alkyl groups, it has no lone pair of electrons but when it attached with pi system, it acts as electron donor because of Hyperconjugation.now, as you know, carbon is slightly more electronegative atom than hydrogen. hence, the carbon atom in alkyl group is higher electron density around it compare with hydrogen atom.As a result of that alkyl groups are able to donate electrons inductively when it attached with a pi system.
for example : see attachment,
basically, electron donor means the species who donates own pair of electrons to other species or atoms. here if we talk about alkyl groups, it has no lone pair of electrons but when it attached with pi system, it acts as electron donor because of Hyperconjugation.
now, as you know, carbon is slightly more electronegative atom than hydrogen. hence, the carbon atom in alkyl group is higher electron density around it compare with hydrogen atom.As a result of that alkyl groups are able to donate electrons inductively when it attached with a pi system.
for example : see attachment,
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