Edexcel Jun 2012 Paper 1 Q24

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24 (a) Give the general formula for the homologous series of alkenes. (1)(b) What is meant by the term unsaturated as applied to alkenes? (1)(c) (i) Name the alkene below using E-Z nomenclature. H3C CH2CH3 C C CH2CH2CH3 (2)(ii) Suggest why this alkene cannot be named using the cis-trans naming system. (1)*P39306A01524* 15 Turn over<br /> (1) (1) (1) (1) (4) (d) Give the structural formula of the organic product of the reaction of ethene, CH2 CH2, with (i) hydrogen. (ii) chlorine. (iii) acidified aqueous potassium manganate(VII). (iv) bromine water. (e) Draw the mechanism for the reaction of propene with hydrogen bromide to give the major product. 16 *P39306A01624*<br /> (f) The structure below shows two repeat units of a polymer. CH3 H CH3 H CH3 H CH3 (i) Give the displayed formulae of two isomeric alkenes, either of which could have given rise to this polymer. (ii) State why the empirical formula of a poly(alkene) is the same as that of the monomer from which it is produced. (2) (1)(iii) State, with a reason, the atom economy for the production of a poly(alkene) from an alkene. (1)(Total for Question 24 = 17 marks) *P39306A01724* 17 Turn over<br />

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