(a)
Interpretation:
Plausible mechanism for the formation of the observed region-
Concept introduction:
Radical or free radical: unpaired valence electron of an atom, molecule, or ion is called as radical.
Stability of Radicals: Radicals are highly unstable due to its unpaired valence electron of an atom.
The increasing order of radical stability is given below
Benzylic > allylic > tertiary > secondary > primary > methyl
Bond strength is depends on the formation of the radical, if the radical is involving in resonance which weakest bond strength.
(b)
Interpretation:
Plausible mechanism for the formation of the given ring-closure reaction has to be proposed.
Concept introduction:
Radical or free radical: unpaired valence electron of an atom, molecule, or ion is called as radical.
Stability of Radicals: Radicals are highly unstable due to its unpaired valence electron of an atom.
The increasing order of radical stability is given below
Benzylic > allylic > tertiary > secondary > primary > methyl
Bond strength is depends on the formation of the radical, if the radical is involving in resonance which weakest bond strength.
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