What is the IUPAC name for the compound CH3-CH2-CH(CH3)-CH2-Br?

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Question: What is the IUPAC name for the compound CH3-CH2-CH(CH3)-CH2-Br?

Options:

Correct Answer: 1-bromo-3-methylbutane

Solution:

The longest carbon chain has four carbons, and the bromine is on the first carbon when numbering from the end closest to the substituent.

What is the IUPAC name for the compound CH3-CH2-CH(CH3)-CH2-Br?

What is the IUPAC name for the compound CH3-CH2-CH(CH3)-CH2-Br?

Step 1: Identify the longest carbon chain in the compound. Count the number of carbon atoms in the chain.
Step 2: The longest chain has 4 carbon atoms, so it is a butane.
Step 3: Identify any substituents (groups attached to the main chain). In this case, there is a bromine (Br) and a methyl (CH3) group.
Step 4: Number the carbon chain starting from the end closest to the substituent. This means starting from the end with the bromine.
Step 5: Assign numbers to each carbon in the chain. The bromine is on carbon 1, and the methyl group is on carbon 2.
Step 6: Combine the names of the substituents with the name of the main chain. The bromine is named as 'bromo' and the methyl group as 'methyl'.
Step 7: Write the IUPAC name by placing the substituents in alphabetical order before the main chain name. The final name is 2-methyl-1-bromobutane.

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