(a)
Interpretation: The resonance structures for the carbocation formed after loss of a leaving group from phytyldiphosphate is to be drawn.
Concept introduction: The Friedel-Craft alkylation is a type of electrophilic substitution reaction.
(b)
Interpretation: The two-step mechanism for Friedel–Crafts alkylation of 1, 4-dihydroxynaphthoic acid with carbocation to form
Concept introduction: The Friedel-Craft alkylation is a type of electrophilic substitution reaction.
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