Chemistry SL paper 3

Chemistry SL paper 3 - 8807-610622 pagesN07/4/CHEMI/SP3/ENG/TZ0/XX Thursday 15 November 2007(morning)CHEMISTRYSTANDARD LEVELPAPER 3IB DIPLOMA

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Unformatted text preview: 8807-610622 pagesN07/4/CHEMI/SP3/ENG/TZ0/XX+Thursday 15 November 2007 (morning)CHEMISTRYSTANDARD LEVELPAPER 3IB DIPLOMA PROGRAMMEPROGRAMME DU DIPLÔME DU BIPROGRAMA DEL DIPLOMA DEL BIINSTRUCTIONS TO CANDIDATES• Write your session number in the boxes above.• Do not open this examination paper until instructed to do so.• Answer all of the questions from two of the Options in the spaces provided. You may continue your answers on answer sheets. Write your session number on each answer sheet, and attach them to this examination paper using the tag provided.• At the end of the examination, indicate the letters of the Options answered in the candidate box on your cover sheet and indicate the number of answer sheets used in the appropriate box on your cover sheet.1 hourCandidate session number88076106© IBO 20078807610601228807-6106– 2 –N07/4/CHEMI/SP3/ENG/TZ0/XX+Option A – Higher physical organic chemistryA1. The following transition state is formed during the reaction of a halogenoalkane with aqueous sodium hydroxide:BrCHO(a) Deduce the structure of the halogenoalkane. Classify it as primary, secondary or tertiary, giving a reason for your choice.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[2](b) The mechanism of this reaction is described as S 2N. Explain what is meant by the symbols in S 2N. Predict a rate expression for this reaction.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[3](c) The same halogenoalkane reacts with sodium hydroxide by an S 1Nmechanism. Deduce the structure of the intermediate formed in this reaction.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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This note was uploaded on 08/15/2011 for the course CHEM 102 taught by Professor Freeman during the Fall '08 term at South Carolina.

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Chemistry SL paper 3 - 8807-610622 pagesN07/4/CHEMI/SP3/ENG/TZ0/XX Thursday 15 November 2007(morning)CHEMISTRYSTANDARD LEVELPAPER 3IB DIPLOMA

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