3.3.14 Organic synthesis (A-level only)

2-Methylbutylamine can be synthesised from an alkene.

What is the identity of the alkene?

• But-2-ene

• Methylpropene

• 2-Methylbut-1-ene

• 2-Methylbut-2-ene

Which one of the following pairs of reagents reacts to form an organic product that shows only 2 peaks in its proton n.m.r. spectrum?

• butan-2-ol and acidified potassium dichromate(VI)

• ethanoyl chloride and methanol

• propanoic acid and ethanol in the presence of concentrated sulphuric acid

• ethene and hydrogen in the presence of nickel

Which one of the following pairs reacts to form an organic product with only 2 singlets in its proton n.m.r. spectrum?

• ethene and bromine

• propan-2-ol and acidified potassium dichromate(VI)

• ethanol and concentrated sulphuric acid

• epoxyethane and water in the presence of dilute sulphuric acid

This question concerns the preparation of the plastic poly(methyl 2-methylpropenoate) (Perspex), starting from propanone.

Which one of the following sets of reagents is not suitable for the step indicated?

• Step 1 HCN (NaCN then dilute HCl)

• Step 2 hot ethanolic KOH

• Step 3 warm aqueous H₂SO₄

• Step 4 CH₃OH with an acid catalyst

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

NGSS.HS-PS1-5

NGSS.HS-PS1-6

This question refers to the reaction sequence in the image.

Which one of the following is not involved in the reaction sequence?

• esterification

• hydrolysis

• nucleophilic addition

• reduction

Which one of the following types of reaction is not involved in the above sequence?

• halogenation

• acylation

• reduction

• oxidation

Which one of the following types of reaction mechanism is not involved in the above sequence?

• free-radical substitution

• nucleophilic substitution

• elimination

• nucleophilic addition-elimination(

Refer to the following reaction sequence:

Which one of the following types of reaction is not involved in the above sequence?

• acylation

• oxidation

• reduction

• dehydration

Refer to the following reaction sequence:

Which one of the following types of reaction mechanism is not involved in the above sequence?

• electrophilic addition

• electrophilic substitution

• addition−elimination

• elimination

Refer to the following reaction sequence:

Which one of the following would be the most appropriate to carry out Step 2?

• H₂ / Ni

• Sn / HCl

• NaBH₄

• Fe / HCl

Tags

NGSS.HS-PS1-2