JEE Main Chemistry question
How many rings (cyclic structures) are present in the product of the following reaction: a bis(iodomethyl)biphenyl-type substrate treated with Cu, (intramolecular Ullmann-type coupling)?
Answer: 5
Solution
Intramolecular coupling of the two benzylic/aryl carbons bearing iodine (mediated by copper, in an Ullmann-type reaction) joins the two ends of the substrate, closing one or more new rings in addition
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