Multiple Choice
Select the correct IUPAC name for the following branched chain alkane: with a methyl group attached to the second carbon of the main chain.
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4. Alkanes and Cycloalkanes
IUPAC Naming
Multiple Choice
What is the correct IUPAC name for the compound with the structure ?
A
Pentane
B
Butane
C
Hexane
D
Propane
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Verified step by step guidance1
Identify the number of carbon atoms in the longest continuous chain of the compound. In this case, count the carbons in the chain: \(\mathrm{CH_3 - CH_2 - CH_2 - CH_2 - CH_3}\).
Determine the root name based on the number of carbons: 1 carbon is methane, 2 is ethane, 3 is propane, 4 is butane, 5 is pentane, and 6 is hexane.
Since the chain has 5 carbon atoms, the root name corresponds to 'pentane'.
Check for any substituents or functional groups attached to the main chain. Here, there are none, so no prefixes or suffixes are needed.
Combine the information to write the full IUPAC name, which is simply the root name 'pentane' for this straight-chain alkane.
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