Draw propan-2-one

How this exercise works

1. Open the exercise in the editor and draw the structure: drag from dot to dot to draw bonds, and tap a bond or an atom to change it.
2. Press Check answer. Equivalent drawings are accepted, and a mistake such as a missing carbon or a misplaced group is explained.
3. Stuck? Hints reveal the structure step by step, and the worked answer explains the name.

This exercise has 3 hints and a worked answer.

How to read a name like this

The suffix -al means an aldehyde, a CHO group at the end of the chain. Its carbon is C1, so -al needs no locant. The suffix -one means a ketone, a C=O on a carbon inside the chain, with the locant of that carbon; -dione means two of them.

Oxo- is the prefix form of a C=O, used when a group that ranks higher gives the suffix, and -carbaldehyde is used for a CHO group attached to a ring.

With -al, -one and oxo-, the C=O carbon is part of the chain or ring and counts in the stem; with -carbaldehyde it is outside the ring. Draw the oxygen with a double bond; the H of an aldehyde group need not be drawn.

Learn the naming rules

The guide Aldehydes and ketones explains the names in this topic, with worked examples.

All the exercises of this family, with a short summary of its naming rules: Nomenclature practice: Aldehydes and ketones.

More exercises: Aldehydes and ketones

• Draw propanal
• Draw butanal
• Draw butan-2-one
• Draw ethanal
• Draw 3-methylbutanal
• Draw cyclohexanone
• Draw pentan-3-one
• Draw 2-methylpropanal
• Draw 3,3-dimethylbutan-2-one
• Draw 2-methylcyclohexan-1-one
• Draw 4-methylpentan-2-one
• Draw pentane-2,4-dione
• Draw cyclohexanecarbaldehyde
• Draw but-3-en-2-one
• Draw 4-hydroxybutan-2-one
• Draw 3-oxobutanal
• Draw cyclohex-2-en-1-one
• Draw 1-phenylethan-1-one

Practice the whole topicName the structures of this topic

Have a structure of your own?

Draw it on the free drawing page and see its name, formula and functional groups as you draw.