Esters

general formula of esters

R1COOR2

Which is the correct structural formula for this ester.

CH3COOCH3

When ethanoic acid and propan-1-ol react, what are the products?

To make esters, we need to add a strong acid. However, the acid is not consumed by the reaction.

This makes the acid a…

catalyst

Which of these molecules is the product of the reaction between propanoic acid and propanol?

Which of these molecules is the product of the reaction between 3-chlorobutan-1-ol and propanoic acid?

How many carbons are there in the main chain of this molecule?

2

What's the IUPAC name for this ester?

• 3-methylbutyl propanoate

What's the name of the ester that would form from butanol and ethanoic acid?

butyl ethanoate

What's the name of the ester that would form from hexanoic acid and ethanol?

ethyl hexanoate

What's the IUPAC name for this ester?

propyl 4-methylpentanoate

What's the IUPAC name for this ester?

1-methylpropyl 3-ethylpentanoate

What are the products of the hydrolysis of propyl butanoate?

propanol and butanoic acid

Acid catalyses the hydrolysis of esters.

Therefore, does the amount of acid affect the point of equilibrium?…

no

What are the products when propyl methanoate is hydrolysed by sodium hydroxide?

sodium methanoate

What are the products of the hydrolysis of esters in acidic conditions?

acid+alcohol

What are the products of the hydrolysis of esters in alkaline conditions?

salt+alcohol

In an alkaline hydrolysis reaction, the ester will be completely converted into a salt, as long as there is enough

NaOH

The hydrolysis of an ester under acidic conditions…(3)

is reversible.

produces an acid.

produces an alcohol

The hydrolysis of an ester under alkaline conditions…(3)

consumes the alkali (NaOH)

produces a salt.

produces an alcohol.

A chemist wants to produce ethyl 2-methylbutanoate.

State the reagents and 2 conditions required for this reaction.

Reagents:

ethanol and 2-methylbutanoic acid

Conditions:

acid and heat