What is the main product of the reaction? CH3-C triple bond with CH Excess HCl.?

Question

What is the main product of the reaction? CH3-C triple bond with CH   Excess HCl.?

Answer

CH3-C(Cl2)-CH3 will form..

Answer

Reaction of CH3-C≡CH with Excess HCl

The reaction between CH3-C≡CH and excess HCl produces a major product and some minor products. The major product of this reaction is:

2-chloro-2-methylpropane (tert-butyl chloride)

Explanation

When CH3-C≡CH is treated with excess HCl, the triple bond breaks and the following reaction takes place:

CH3-C≡CH + HCl → CH3-C(Cl)=CH2

The product CH3-C(Cl)=CH2 is a vinyl chloride. This product can further react with HCl to produce 1,1-dichloro-1-methylpropane (tert-butyl chloride) as a minor product:

CH3-C(Cl)=CH2 + HCl → CH3-C(Cl)(H)-CH3

However, the major product of this reaction is 2-chloro-2-methylpropane (tert-butyl chloride) which is formed when the vinyl chloride reacts with excess HCl:

CH3-C(Cl)=CH2 + 2HCl → CH3-C(Cl)(H)-CH3 + H2O

2-chloro-2-methylpropane (tert-butyl chloride) is a primary alkyl halide that can undergo substitution reactions to form a variety of products such as alcohols, ethers, and amines.

Conclusion

The reaction between CH3-C≡CH and excess HCl produces 2-chloro-2-methylpropane (tert-butyl chloride) as the major product and 1,1-dichloro-1-methylpropane as a minor product. This reaction is important in organic chemistry as it demonstrates the use of HCl as a reagent for breaking triple bonds and the formation of primary alkyl halides.

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