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Multiple Choice
What is the IUPAC name for the compound with the structure ?
A
Butane
B
Methane
C
Propane
D
Pentane
Verified step by step guidance
1
Identify the number of carbon atoms in the longest continuous chain of the given compound. Here, the structure is CH\_3-CH\_2-CH\_2-CH\_3, which contains 4 carbon atoms in a row.
Recall the IUPAC nomenclature for alkanes, where the prefix indicates the number of carbons: 'meth-' for 1, 'eth-' for 2, 'prop-' for 3, 'but-' for 4, and 'pent-' for 5 carbons.
Since the compound has 4 carbons and only single bonds (alkane), the suffix '-ane' is used to indicate it is a saturated hydrocarbon.
Combine the prefix and suffix to form the name: 'but' + 'ane' = 'butane'.
Verify that there are no branches or functional groups that would change the name; since the molecule is a straight-chain alkane, the correct IUPAC name is 'butane'.