Question

how to find the IUPAS name of the compound
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Answer 1

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Answer 2

Identify the functional group

The compound is a hydrocarbon with single bonds between the carbon atoms. It is an alkane and will have a suffix of -ane.

Find the longest carbon chain

There are four carbon atoms in the longest chain. The prefix of the compound will be but-.

Number the carbon atoms in the longest chain

The numbering has been done for you here.

Look for any branched group, name them and give their position on the carbon chain

There are no branched groups in this compound.

Combine the elements of the name into a single word

The name of the compound is butane.