CIE Nov 2015 v1 Paper 4 Q7

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12 PMT (a) Sunset Yellow is a yellow colouring agent used in food and drinks, which can be made by the following route. In step 3 of this synthesis, a phenol-like compound, S, reacts with intermediate T made from amine R. Assume that the SO3Na+ group does not react. O2N SO3Na+ step 1 R (C6H6NSO3Na) step 2 step 3 NaOH(aq) OH SO3Na+ Na+ O3S Sunset Yellow (i) Suggest structures for compounds R, S and T and draw them in the boxes above. [3] (ii) Suggest reagents and conditions for step 1,step 2.[3] (iii) What type of organic salt is formed in step 2?[1]UCLES 2015 9701/41/O/N/15<br /> PMT (b) Compound W has the following structure. 13 H2N NH2 (i) How manyandbonds are present in a molecule of W?bondsbonds[2] (ii) The products of the reactions of W with cold HCl and with CH3CH2Br are soluble in water but not in organic solvents. Complete the table for these reactions of W. reagent structure of product (molecular formula given) type of reaction HCl CH3CH2Br (C4H9N2OCl ) (C6H13N2BrO) [3] [Total: 12]UCLES 2015 9701/41/O/N/15 [Turn over<br />

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