AQA Jun 2014 Paper 4 Q4

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do not write outside the box kevlar is a polymer used in protective clothing the repeating unit within the polymer chains of kevlar is shown a name the strongest type of interaction between polymer chains of kevlar mark b one of the monomers used in the synthesis of kevlar is h n nh an industrial synthesis of this monomer uses the following two stage process starting from compound x stage cl no nh h n no nh cl stage h n no h n nh b i suggest why the reaction of ammonia with x in stage might be considered unexpected marks wmp jun chem b ii suggest a combination of reagents for the reaction in stage do not write outside the box mark b iii compound x can be produced by nitration of chlorobenzene give the combination of reagents for this nitration of chlorobenzene write an equation or equations to show the formation of a reactive intermediate from these reagents marks reagents equation s b iv name and outline a mechanism for the formation of x from chlorobenzene and the reactive intermediate in question b iii marks name of mechanism mechanism turn over for the next question turn over wmp jun chem

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