Which free radical structure will show the ma | vedclass

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Question

(A) The stability of a free radical is determined by the number of resonance structures it can form. In the structure $\phi - \dot{C}H - \phi$ (diphen

Vedclass · Accepted Answer

$\phi - \dot{C}H - \phi$

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(A) The stability of a free radical is determined by the number of resonance structures it can form. In the structure $\phi - \dot{C}H - \phi$ (diphenylmethyl radical),the unpaired electron is delocalized over two phenyl rings,providing a large number of resonance structures. In $\phi - \dot{C}H_2$ (benzyl radical),it is delocalized over one phenyl ring. In $\phi - \dot{C}H - CH_3$,it is delocalized over one phenyl ring and stabilized by hyperconjugation. Therefore,$\phi - \dot{C}H - \phi$ shows the maximum resonance.

Which free radical structure will show the maximum resonance? (Given: $\phi = C_6H_5$)

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