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Multiple Choice
What is the correct IUPAC name for the compound with the structure ?
A
Methane
B
Pentane
C
Propane
D
Butane
Verified step by step guidance
1
Identify the molecular formula of the compound given by the structure \(\mathrm{CH_3 - CH_2 - CH_2 - CH_3}\). Count the total number of carbon atoms in the longest continuous chain.
Determine the length of the carbon chain. Since there are 4 carbon atoms connected in a row, the parent hydrocarbon is an alkane with 4 carbons.
Recall the IUPAC naming convention for alkanes: the prefix indicates the number of carbons, and the suffix '-ane' indicates single bonds. For 4 carbons, the prefix is 'but-'.
Combine the prefix and suffix to form the name 'butane' for the compound, as it is a straight-chain alkane with 4 carbons and no branches or functional groups.
Verify that the other options do not match the structure: 'methane' has 1 carbon, 'propane' has 3 carbons, and 'pentane' has 5 carbons, so 'butane' is the correct IUPAC name.