Write a structural formula for the most stable cyclohexadienyl cation intermediate formed in each of the following

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Write a structural formula for the most stable cyclohexadienyl cation intermediate formed in each of the following reactions. Is this intermediate more or less stable than the one formed by electrophilic attack on benzene?
(a) Bromination of p-xylene
(b) Chlorination of m-xylene
(c) Nitration of acetophenone
(d) Friedel–Crafts acylation of anisole with CH3CCI
(e) Nitration of isopropyl benzene
(f) Bromination of nitrobenzene
(g) Sulfonation of furan
(h) Bromination of pyridine
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Organic Chemistry

ISBN: 978-0072905014

4th edition

Authors: Francis A. Carey

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