Exam 7: Reactions of Alkynes Introduction to Multistep Synthesis

A mixture of 1-heptyne, 2-heptyne, and 3-heptyne was hydrogenated in the presence of a platinum catalyst until hydrogen uptake ceased. If one assumes that the hydrogenation went to completion, how many distinct seven-carbon hydrocarbons were produced?

Provide the structure of the major organic product(s)in the reaction below.

Give the systematic name of the compound shown below.

Describe a sequence of reactions by which butylbenzene can be prepared from phenylacetylene.

Complete the following tree of reactions by giving the major products.

Provide the structure of the major organic produt that results when 2-butyne is treated with 1 equivalent of Br₂

Provide the major organic product in the reaction below.

Name the following compound.

Give the major organic product for the reaction.

Which of the following statements is not true about propyne, HC C-CH₃?

Provide the structure of the major organic produt that results when 2-butyne is treated with 1 equivalent of HCl.

Provide the structure of the major organic produt that results when 2-butyne is treated with 2 equivalents of HCl.

Provide the structure of the major organic product(s)in the reaction below.

Provide the structure of the major organic produt that results when 2-butyne is treated with HgSO₄/H₂SO₄ in water

Draw an acceptable structure for 3-sec-butyl-1-heptyne.

Describe a sequence of reactions by which trans-2-pentene can be prepared from propyne.

Provide the structure of the major organic product of the following reaction.

Among the compounds water, 1-butyne, 2-butyne, and ethane, which are stronger acids than ammonia?

Draw an acceptable structure for acetylene.