MEDIUM
Diploma
IMPORTANT
Earn 100

Deduce a multi-step synthesis for each of the following conversion. For each step state the structural formulae of the reactants and products and the conditions used for the reactions.

2-chlorobutane to butan-2-one (2 steps)

Important Questions on Organic Chemistry [AHL]

MEDIUM
Diploma
IMPORTANT

Synthetic organic chemists often use a method referred to as retro-synthesis. Starting with knowledge of the structure and properties of the target compound, they think “in reverse” to determine possible synthetic pathways to produce it. Imagination, intuition, and reasoning all play their part in scientific innovation. Imagination transcends the limitations of acquired knowledge and opens up the possibility of new ideas.

What are the roles of these ways of thinking in solving synthetic pathway problems? Is retro synthesis a combination of understanding and imagination?

MEDIUM
Diploma
IMPORTANT

Which two molecules in given figure are cis–trans isomers of each other?

Question Image

MEDIUM
Diploma
IMPORTANT

There are several structural isomers with the molecular formula C5H11Br.

Deduce the name of one of the isomers which can exist as enantiomers and draw three-dimensional representations of its two enantiomers.

MEDIUM
Diploma
IMPORTANT

C5H11Br+NaOHC5H11OH+NaBr

The reaction with 1-bromopentane proceeds by an SN2 mechanism. Describe this mechanism using structural formulas and curly arrows to represent the movement of electron pairs.

MEDIUM
Diploma
IMPORTANT

Explain why 1-bromopentane reacts by an SN2 mechanism whereas 2-bromo-2-methylbutane reacts by an SN1 mechanism.

MEDIUM
Diploma
IMPORTANT

Deduce a multi-step synthesis for each of the following conversion. For each step state the structural formulae of the reactants and products and the conditions used for the reactions.

2-chlorobutane to butan-2-one (2 steps)

MEDIUM
Diploma
IMPORTANT

Deduce a multi-step synthesis for each of the following conversion. For each step state the structural formulae of the reactants and products and the conditions used for the reactions.

Propene to propyl ethanoate (2 steps)