10 Questions
Why do alkynes readily undergo addition reactions?
Because the pi bonds of alkynes are electron-rich, like alkenes
Why are the reactions of alkynes usually exothermic?
Sigma bonds are generally stronger than pi bonds
How many pi bonds do alkynes have?
Two
Why should we consider the possibility of double addition when a reagent adds across the triple bond of an alkyne?
Because alkynes have two pi bonds
Under what conditions might a reaction across the triple bond of an alkyne stop after a single addition?
Specific reaction conditions
Alkynes have a higher bond energy than alkenes.
True
Pi bonds in alkynes are electron-poor.
False
Alkynes can only have one molecule add across the triple bond.
False
Reactions across the triple bond of an alkyne never result in double addition.
False
Sigma bonds are generally weaker than pi bonds in alkynes.
False
Learn about the similarities between the reactions of alkynes and alkenes, focusing on addition reactions and bond energies. Understand the exothermic nature of these reactions and the potential for up to two molecules to add across the triple bond in alkynes.
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