Propose a structure for the reactive electrophile

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Question- In the Gatterman-Koch reaction, a formyl (-CHO) group is introduced directly onto a benzene ring. For example, reaction of toluene with CO and HCl in the presence of mixed CuCl/AlCl3 gives p-methylbenzaldehyde. Propose a structure for the reactive electrophile.

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Reference no: EM13716034

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