AQA Jun 2012 Paper 4 Q8

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do not write outside the box when the molecular formula of a compound is known spectroscopic and other analytical techniques can be used to distinguish between possible structural isomers draw one possible structure for each of the compounds described in parts a to d a compounds f and g have the molecular formula c h n o and both are dinitrobenzenes f has two peaks in its c n m r spectrum g has three peaks in its c n m r spectrum space for working marks wmp jun chem do not write outside the box b compounds h and j have the molecular formula c h both have only one peak in their h n m r spectra h reacts with aqueous bromine but j does not space for working marks question continues on the next page turn over wmp jun chem do not write outside the box c k and l are cyclic compounds with the molecular formula c h o both have four peaks in their c n m r spectra k is a ketone and l is an aldehyde space for working marks wmp jun chem do not write outside the box d compounds m and n have the molecular formula c h n m is a tertiary amine with only two peaks in its h n m r spectrum n is a secondary amine with only three peaks in its h n m r spectrum space for working marks end of questions wmp jun chem

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