91Ó°ÊÓ

There are seven isomeric alkynes with the formula${\mathbf{C}}_{\mathbf{6}}{\mathbf{H}}_{\mathbf{10}}$ . Draw and name them.

Each of the following syntheses requires more than one step. How

would you carry them out?

(a)

(b)

What products would you expect from the following reactions?

a. ${\mathbf{CH}}_{\mathbf{3}}{\mathbf{CH}}_{\mathbf{2}}{\mathbf{CH}}_{\mathbf{2}}\mathbf{C}\mathbf{≡}\mathbf{CH}\mathbf{+}{\mathbf{Cl}}_{\mathbf{2}}$

What products would you expect from the following reactions?

c. ${\mathbf{CH}}_{\mathbf{3}}{\mathbf{CH}}_{\mathbf{2}}{\mathbf{CH}}_{\mathbf{2}}{\mathbf{CH}}_{\mathbf{2}}\mathbf{C}\mathbf{≡}{\mathbf{CCH}}_{\mathbf{3}}\mathbf{+}\mathbf{HBr}$

Using any alkyne needed, how would you prepare the following alkenes?

Using any alkyne needed, how would you prepare the following alkenes?

(b) cis-3-Heptene

Using any alkyne needed, how would you prepare the following alkenes?

(c) 3-Methyl-1-pentene