15. Halogen compounds
A section of Chemistry, 9701
Listing 10 of 284 questions
A series of reactions starting from 1-bromobutane is shown. 1-bromobutane CH3(CH2)3CO2H HCN and KCN R reaction 1 OH–P polymer Q but-1-ene reaction 2 Draw the displayed formula of compound P. Identify the reagentand conditions for reactions 1 and 2. reaction 1 reaction 2 Draw the structure of the repeat unit of polymer Q. Complete the reaction scheme to show the mechanism of the reaction of 1-bromobutane with OH–to produce R. Include all necessary charges, dipoles, lone pairs and curly arrows and the structure of R. C H Br CH3CH2CH2 H –OH But-1-ene reacts with steam as shown to form a mixture of two structural isomers, S and T. S major product U T minor product reflux Cr2O7 2– / H+ but-1-ene + steam S can be oxidised with acidified potassiumdichromate(to form compound U. S and U both react with alkaline aqueous iodine. Identify the type of reaction that occurs when but-1-ene reacts with steam. State what can be deduced about the structure of S from its reaction with alkaline aqueous iodine. Explain why S is the major product of the reaction of but-1-ene with steam. Draw the skeletal formulae of S, T and U. S T U Write an equation to represent the oxidation of S to U by acidified potassium dichromate(. You should use to represent the oxidising agent. CH3(CH2)3CO2H is a colourless liquid with an unpleasant odour. It reacts with methanol in the presence of an acid catalyst to produce an organic product V, which has a pleasant fruity smell. Name V. A student analysed CH3(CH2)3CO2H, methanol and V using infra-red spectroscopy. The spectra were returned to the student without labels. Identify which of the infra-red spectra, X, Y or Z, corresponds to V. compound CH3(CH2)3CO2H methanol V spectrum Explain your answer with reference to relevant features of the three spectra in the region above 1500 cm–1.
9701_m17_qp_22
THEORY
2017
Paper 2, Variant 2
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