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Name the following organic compound: CH3CH2CH(CH3)CH(Br)CH3

Chemistry

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Answer

2-Bromo-3-methylpentane\text{2-Bromo-3-methylpentane}

Step-by-step solution

5 steps

  1. Identify the longest continuous carbon chain.

    The molecule has two central carbons. Let's expand the C2H5\text{C}_2\text{H}_5 group to CH2CH3\text{CH}_2\text{CH}_3.
    The structure can be written as:

    CH3−CH2−CH(CH3)−CH(Br)−CH3\text{CH}_3-\text{CH}_2-\text{CH}(\text{CH}_3)-\text{CH}(\text{Br})-\text{CH}_3

    The longest continuous carbon chain is 5 carbons long. This is a pentane.

  2. Number the carbon chain to give substituents the lowest possible numbers.

    There are two ways to number the chain:

    • From left to right: CH3−CH2−CH(CH3)−CH(Br)−CH3\text{CH}_3-\text{CH}_2-\text{CH}(\text{CH}_3)-\text{CH}(\text{Br})-\text{CH}_3 1 2 3 4 5 Substituents are at positions 3 (methyl) and 4 (bromo). The set of locants is (3, 4).

    • From right to left: CH3−CH(Br)−CH(CH3)−CH2−CH3\text{CH}_3-\text{CH}(\text{Br})-\text{CH}(\text{CH}_3)-\text{CH}_2-\text{CH}_3 5 4 3 2 1 Substituents are at positions 2 (bromo) and 3 (methyl). The set of locants is (2, 3).

    Comparing the sets of locants, (2, 3) is lower than (3, 4). Therefore, numbering from right to left is correct.

  3. Identify and name all substituents.

    • At carbon 2: Bromo (Br\text{Br})
    • At carbon 3: Methyl (CH3\text{CH}_3)

  4. List substituents in alphabetical order.

    Bromo comes before Methyl.

  5. Combine the substituent names and the parent chain name.

    The name is 2-Bromo-3-methylpentane.

    The name of the organic compound is:

    2-Bromo-3-methylpentane\text{2-Bromo-3-methylpentane}
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