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When HCl is reacted with 1,3-butadiene at room temperature, which product will be in higher yield?

A. 1,4-Addition product
B. 1,2-Addition product
C. Polymer
D. Elimination product

User Sumita
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1 Answer

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Final answer:

At room temperature, 1,3-butadiene reacts with HCl to give the 1,4-Addition product in higher yield due to the stability of the intermediate carbocation formed in this reaction. The option (A) is correct.

Step-by-step explanation:

When HCl is reacted with 1,3-butadiene at room temperature, the product with a higher yield is the 1,4-addition product. This is because, in the presence of a polar protic acid like HCl, 1,3-butadiene typically undergoes conjugate addition (also known as 1,4-addition).

This reaction leads to the formation of a more stable secondary carbocation intermediate which can then react with a chloride ion to give the 1,4-addition product. The 1,2-addition product, which involves the formation of a less stable primary carbocation, is formed as well, but with a lower yield compared to the 1,4-addition product at room temperature. At higher temperatures, the 1,2-addition product could predominate due to kinetic control. Therefore, option (A) is correct.

User Wlixcc
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