Home › JEE Advanced › Chemistry › Aldehydes, Ketones and Carboxylic Acids › In Friedel-Crafts acylation, RCOCl + AlCl₃ + ben…
In Friedel-Crafts acylation, RCOCl + AlCl₃ + benzene gives:
APhenol
BRandom
CPh-CO-R (aryl ketone; AlCl₃ generates acylium R-CO⁺)
DRCH₂-Ph
Answer & Solution
Correct answer: C. Ph-CO-R (aryl ketone; AlCl₃ generates acylium R-CO⁺)
R-COCl + AlCl₃ → R-CO⁺ + AlCl₄⁻. Acylium electrophile attacks aromatic ring (EAS). Gives aryl ketone. Why Friedel-Crafts acylation preferred to alkylation (no rearrangement, no polysubstitution).
Related questions
Against ketones, aldehydes in nucleophilic addition are:Aldehydes and ketones take part in addition that is:Solubility of aldehydes falls as the alkyl chain grows:Methanal, ethanal and propanone mix with water in:Aldehydes boil lower than alcohols of like mass because they lack:Aldehydes boil higher than hydrocarbons of like mass because of:At room temperature methanal exists as a:The carbonyl carbon behaves as a centre that is: