Topic 17 Carbonyls (RGSHW)
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Last updated about 1 year ago
11 questions
1
Methyl ester
Methyl ester
1
Reaction with lithium aluminium tetrahydride and phosphorous (V) chloride.
Reaction with lithium aluminium tetrahydride and phosphorous (V) chloride.
1
Comparison of acyl chloride and carboxylic acid in esterification.
Comparison of acyl chloride and carboxylic acid in esterification.
1
Single step carboxylic acid synthesis
Single step carboxylic acid synthesis
1
Polyester
Polyester
1
1
State what tests you would perform in each case, and the result you would expect, to show that (i) ethanal contains a carbonyl
State what tests you would perform in each case, and the result you would expect, to show that
(i) ethanal contains a carbonyl
1
State what tests you would perform in each case, and the result you would expect, to show that
ethanal is an aldehyde
State what tests you would perform in each case, and the result you would expect, to show that
ethanal is an aldehyde
4
Ethanal reacts with HCN, in the presence of a catalyst of cyanide ions from KCN, to give a cyanohydrin, CH₃CH(OH)CN.
(i) Give the mechanism for this reaction. (3 marks)
Ethanal reacts with HCN, in the presence of a catalyst of cyanide ions from KCN, to give a cyanohydrin, CH₃CH(OH)CN.
(i) Give the mechanism for this reaction. (3 marks)
1
Explain why it is necessary to use HCN and KCN in this reaction, rather than HCN on its own. (1 mark)
Explain why it is necessary to use HCN and KCN in this reaction, rather than HCN on its own. (1 mark)
1
Explain why the product mixture from this reaction is not optically active. (2 marks)
Explain why the product mixture from this reaction is not optically active. (2 marks)