AQA Jun 2016 Paper 4 Q3

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do not write outside the box lidocaine is a local anaesthetic used in dentistry and in minor surgical operations the synthesis of lidocaine in steps from dimethylphenylamine is shown ch nh ch step cl ch c cl ch nh ch ch cl ch nh ch step ch cl h n ch ch ch ch ch a nh ch ch lidocaine b n ch ch ch ch a i give the iupac name of reagent x in step mark a ii outline a mechanism for step in your answer use rnh to represent dimethylphenylamine marks b name the mechanism for step mark wmp jun chem do not write outside the box c which of these is the total number of peaks in the c n m r spectrum of lidocaine tick one box d calculate the percentage by mass of hydrogen in a molecule of lidocaine mark marks e give the name including the classification of the functional group that contains the nitrogen atom labelled b mark f lidocaine is used medically as the salt lidocaine hydrochloride f i suggest which one of the nitrogen atoms labelled a or b is protonated in lidocaine hydrochloride explain your answer marks nitrogen atom protonated explanation f ii suggest why lidocaine hydrochloride is used medically in preference to lidocaine explain your answer marks turn over wmp jun chem

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