When an excess of benzene reacts with dichloromethane () in the presence of anhydrous , diphenylmethane is formed as the main product. How many distinct benzene rings are present in one molecule of di

Question

When an excess of benzene reacts with dichloromethane ($CH_2Cl_2$) in the presence of anhydrous $AlCl_3$, diphenylmethane is formed as the main product. How many distinct benzene rings are present in one molecule of diphenylmethane?

Prashant Kotian · Accepted Answer

Correct answer: 2. Dichloromethane has two leaving groups (chlorine atoms). Under Friedel-Crafts conditions, it sequentially alkylates two separate benzene rings. The resulting product is diphenylmethane (), which contains exactly 2 benzene rings joined by a methylene bridge.

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