Open Question
Give the IUPAC name for each of the following:
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13. Alkenes, Alkynes, and Aromatic Compounds
Naming Benzene
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Determine the systematic name of the molecule.
A
1-iodo-4-bromobenzene
B
1-bromo-4-iodobenzene
C
4-bromo-1-iodobenzene
D
4-iodo-1-bromobenzene
Verified step by step guidance1
Identify the parent structure: The molecule is based on benzene, which is a six-carbon ring with alternating double bonds.
Identify the substituents: The molecule has two substituents, iodine (I) and bromine (Br), attached to the benzene ring.
Determine the positions of the substituents: The iodine is attached to one carbon, and the bromine is attached to the carbon directly opposite, making them in a para position.
Assign the lowest possible numbers to the substituents: Number the carbon atoms in the benzene ring starting from the iodine as position 1, making bromine position 4.
Construct the systematic name: Based on the numbering, the systematic name is 1-iodo-4-bromobenzene, but the correct systematic name should prioritize bromine over iodine due to alphabetical order, resulting in 1-bromo-4-iodobenzene.
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