AQA Jun 2013 Paper 4 Q4

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do not write outside the box this question is about acylium ions rco a the acylium ion h c c o is formed in a mass spectrometer by fragmentation of the molecular ion of methyl ethanoate write an equation for this fragmentation include in your answer a displayed formula for the radical formed marks b the acylium ion h c c o can also be formed from ethanoyl chloride the ion reacts with benzene to form c h coch b i write an equation to show the formation of this acylium ion by the reaction of ethanoyl chloride with one other substance marks b ii name and outline a mechanism for the reaction of benzene with this acylium ion name of mechanism mechanism b iii ethanoic anhydride also reacts with benzene to form c h coch write an equation for this reaction marks mark turn over wmp jun chem

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