Organic Synthesis
35 questions· page 1 of 4
Three mixtures are heated under reflux.
Which mixtures will produce sodium propanoate as one product?
Options
A 1, 2 and 3
B 1 and 2 only
C 2 and 3 only
D 3 only
An organometallic lithium compound, RLi, contains the nucleophile .
reacts with pentan-2-one. The mechanism is nucleophilic addition. The first step produces an anion which is then protonated to form the final product.
Which organic product is formed?
Options
A sequence of reactions takes place. The major product is compound Z.
What is compound Z?
Options
A propanone
B propene
C propan-1-ol
D propan-2-ol
X and Y are the reagents required to convert 1-bromopropane into butanoic acid.
What are the correct identities of reagents X and Y?
Options
| X | Y | |
|---|---|---|
| A | ||
| B | ||
| C | ||
| D |
When X is added to and heated under reflux, pentan-2-ol is made.
Which organic product is made when X is heated with a solution of KCN dissolved in ethanol?
Options
Propanoic acid can be made from bromoethane using a two-stage synthesis.
Which pair of reagents is most suitable?
Options
| reagent for stage 1 | reagent for stage 2 | |
|---|---|---|
| A | hydrogen cyanide | aqueous sodium hydroxide |
| B | aqueous sodium hydroxide | excess acidified potassium dichromate(VI) |
| C | ethanolic sodium hydroxide | acidified potassium manganate(VII) |
| D | potassium cyanide | dilute hydrochloric acid |
Propanoic acid can be used to make propene by a two-stage synthesis.
Which row shows suitable reagents for this synthesis?
Options
| reagent for first stage | reagent for second stage | |
|---|---|---|
| A | conc. | |
| B | in ethanol | |
| C | conc. | |
| D | in ethanol |
Propanoic acid can be made from bromoethane using a two-stage synthesis.
Which pair of reagents is most suitable?
Options
| reagent for stage 1 | reagent for stage 2 | |
|---|---|---|
| A | hydrogen cyanide | aqueous sodium hydroxide |
| B | aqueous sodium hydroxide | excess acidified potassium dichromate(VI) |
| C | ethanolic sodium hydroxide | acidified potassium manganate(VII) |
| D | potassium cyanide | dilute hydrochloric acid |
The structure of coniine is shown.
Coniine can be synthesised by reacting ammonia with a dibromo compound, X.
What is compound X?
Options
A 1,1-dibromo-2-propylcyclopentane
B 1,2-dibromo-2-propylcyclopentane
C
D
Which compound can be used to make propanoic acid by treatment with a single reagent?
Options
A
B
C
D