| Qu1: |
How many a-hydrogens are there
in each of the following aldehydes and ketones ? |
|
| (a) (CH3)2C=O |
(b) CH3CHO |
(c) H2C=O |
| (d) PhCHO |
(e) 2-pentanone |
(f) 3-pentanone |
|
| Qu 2: |
For each of the following pairs of compounds, draw their enols tautomers and
choose the one compound that has the greater enol content. |
|
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| Qu 3: |
Draw the stepwise curly arrow mechanism for the tautomerisation of
propanone with (i) and acid catalyst, H3O+ and (ii)
a base catalyst, HO- |
|
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| Qu 4: |
What are the major products of the reactions of 1-phenylethanone (acetophenone)
with each of the following: |
|
| (a) |
Bromine in acetic acid |
|
acetophenone
|
| (b) |
Iodine in sodium hydroxide solution |
|
| (c) |
(i) NaOH then (ii) add ethyl iodide |
|
| (d) |
Ethyl magnesium bromide followed by acidic work up |
|
| (e) |
NaOH and methanal |
|
| (f) |
NaOH and benzaldehyde |
|
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| Qu 5: |
What are the major products of the reactions of 2-cyclohexenone
with each of the following: |
|
| (a) |
NH3 in water |
| (b) |
Ethanethiol |
| (c) |
Lithium diethylcuprate then acidic work-up |
| (d) |
Ethyl lithium then acidic work-up |
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