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Multiple Choice
Select the proper IUPAC name for the compound shown: .
A
Pentane
B
Propane
C
Hexane
D
Butane
Verified step by step guidance
1
Identify the molecular formula and structure of the compound given. The compound is a straight chain of carbon atoms with hydrogens filling the remaining valences, represented as CH\_3-CH\_2-CH\_2-CH\_2-CH\_3.
Count the number of carbon atoms in the longest continuous chain. Here, there are 5 carbon atoms connected in a row.
Recall the IUPAC naming convention for alkanes, where the prefix indicates the number of carbons: 'meth-' for 1, 'eth-' for 2, 'prop-' for 3, 'but-' for 4, 'pent-' for 5, and 'hex-' for 6 carbons.
Since the compound has 5 carbons and is an alkane (only single bonds), the correct prefix is 'pent-' and the suffix is '-ane', forming the name 'pentane'.
Verify that there are no branches or functional groups that would change the base name; since none are present, the correct IUPAC name is 'pentane'.