Edexcel Jan 2015 (IAL) Paper 1 Q23

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23 Iodine monochloride, ICl, is an interhalogen compound. Molecules of iodine monochloride have a permanent dipole. Alkenes react with ICl, under suitable conditions, in a similar way to the reaction of alkenes with hydrogen chloride, HCl. (a) Propene reacts with ICl to form two possible organic products. One of these products is 2-chloro-1-iodopropane. (i) Complete the mechanism below, by adding curly arrows and the intermediate species. CH3 (cid:303)+ (cid:303) CI (3) CH3 CI (2) (ii) Classify the type and mechanism for the reaction in (a)(i).(iii) Draw the structure of the other possible organic product of the reaction of propene with ICl. (1) *P45041A01724* 17 Turn over<br /> (b) Methane reacts with ICl, under suitable conditions, to form many products. Two of these products are iodomethane and hydrogen chloride. The reaction between methane and ICl is similar to that between methane and chlorine, Cl2. (i) Suggest the essential condition needed for this reaction. (1)*(ii) The mechanism for the reaction between methane and ICl involves three stages. One of these is the third and final stage, called termination. Describe the mechanism of the reaction to form iodomethane and hydrogen chloride. In your answer, include: the type of reaction and mechanism the type of bond fission occurring (cid:404) (cid:404) (cid:404) (cid:404) (cid:404) one equation for a termination step the name and equations for the the name and equation for the first stage of the mechanism second stage of the mechanism Curly (half-) arrows and state symbols are not required in your equations. (7) Type of reaction and mechanismType of bond fission occurring18 *P45041A01824*<br /> (Total for Question 23 = 14 marks) *P45041A01924* 19 Turn over<br />

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