Question

What products would you expect from the following reactions?

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

Short answer

a.

Step-by-step solution

Markovnikov reactions

In this the alkyne is converted to alkene by the halogenation that the three out of one triple bond is break foe the addition of halogen but the halogen are added always in trans geometry.

Reaction of alkyne with halide CH3CH2CH2C≡CH+Cl2

When alkyne reacts with halide they undergo an additional reaction to form a halogen-substituted alkene. Alkyne follows Markovnikov regiochemistry in which two added halogen atoms are always in a trans relationship with each other as shown: