10. Addition Reactions

Which electrophilic addition reactions

c. form a three-membered ring

Which electrophilic addition reactions

d. form a five-membered ring intermediate?

What would the yield be if two more steps (each with an 80% yield) were added to the synthesis?

Predict the products of reaction of pent-1-yne with the following reagents.

d. H₂, Pd/BaSO₄, quinoline

e. 1 equivalent of Br₂

f. 2 equivalents of Br₂

What stereoisomers are obtained when 2-butyne undergoes each of the following reaction sequences?

c. 1. Cl₂/CH₂Cl₂ 2. Br₂/CH₂Cl₂

What reagents should be used to carry out the following syntheses?