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Ch.22 - Organic Chemistry
Chapter 22, Problem 48d

List all the possible products for each alkane substitution reaction. (Assume monosubstitution.) d. CH3CHBr2 + Br2 →

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Alkane Substitution Reactions

Alkane substitution reactions involve the replacement of one hydrogen atom in an alkane with another atom or group, typically through a free radical mechanism. In these reactions, alkanes react with halogens (like Br2) to form haloalkanes. The process usually requires heat or light to initiate the formation of free radicals, which are highly reactive species that drive the substitution.
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Free Radical Mechanism

The free radical mechanism is a multi-step process that includes initiation, propagation, and termination steps. In the initiation step, a halogen molecule (e.g., Br2) is broken into two free radicals, which can then react with alkanes. During propagation, these radicals react with alkane molecules to form new radicals and products, continuing the chain reaction until termination occurs when two radicals combine.
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Monosubstitution Products

In the context of monosubstitution, only one hydrogen atom in the alkane is replaced by a halogen atom. For the reaction CH3CHBr2 + Br2, the possible products include dibrominated alkanes and brominated alkanes, depending on which hydrogen is substituted. The specific products can vary based on the position of substitution and the stability of the resulting radicals.
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