객관식
What is the IUPAC name of the compound ?
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4. Alkanes and Cycloalkanes
Alkane Nomenclature
객관식
What is the IUPAC name of the molecule with the structure ?
A
Pentane
B
2-Methylpropane
C
Butane
D
Propane
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검증된 단계별 안내1
Identify the molecular formula and structure of the given compound. The structure shown is a straight chain of four carbon atoms connected by single bonds, each carbon bonded to the appropriate number of hydrogens to satisfy the tetravalency of carbon.
Determine the longest continuous carbon chain in the molecule. Since there are four carbons in a row, the longest chain is four carbons long.
Recall the IUPAC nomenclature for alkanes: the prefix indicates the number of carbons in the longest chain, and the suffix '-ane' indicates single bonds. For four carbons, the prefix is 'but-'.
Since there are no branches or substituents attached to the main chain, the name is simply the prefix plus the suffix, resulting in 'butane'.
Verify that the other options do not match the structure: 'pentane' has five carbons, '2-methylpropane' is a branched isomer with three carbons in the main chain and a methyl group, and 'propane' has three carbons. Therefore, the correct IUPAC name is 'butane'.
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