Draw the major monobromination product formed by heating the following alkane with bromine.

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  1. What is the major monobromination product formed by heating the following alkane with bromine ?

    Free radical substitution
    Alkanes are saturated compounds. Alkanes can be converted to haloalkanes by free radical substitution reaction. In this reaction, free radicals are formed as intermediates.

    Answer and Explanation:
    Alkanes are saturated compounds and cannot undergo addition reactions. Alkanes therefore form haloalkanes by free radical substitution. Free radical substitution occurs by formation of a free radical. The major product formed depends on the stability of the radical. The reaction of 2,2,4-trimethylpentane with bromine molecule is shown below.

    Reaction

    In the above reaction, a tertiary radical is formed at the fourth carbon. Further, bromine radical is attached at that radical to form 2-bromo-2,4,4-trimethylpentane and HBr as side product.

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