Final answer:
Many alkenes can react with BH₃ in hydroboration, including simple ones like ethene and propene, as well as various isomers of butene. The number of reactive alkenes is broad because of the variations in alkene structures.
Step-by-step explanation:
Alkenes are highly reactive in chemical reactions, especially in addition reactions where the pi bond of the double bond is broken. One notable reaction is hydroboration, which involves the addition of BH₃ (borane) to alkenes.
The hydroboration reaction proceeds through a concerted mechanism, yielding an organoborane intermediate that can be further oxidized to form an alcohol.
The reaction with BH₃ typically involves the non-markovnikov addition of hydrogen and boron across the double bond of alkenes. Since there are a variety of alkenes possible, with different substituents and arrangements, the number of alkenes that can react with BH₃ is correspondingly diverse.
Therefore, many alkenes can participate in hydroboration, depending on their molecular structure and stability. For instance, the alkenes with formulas C2H4 (ethene), C3H6 (propene), and various isomers of C4H8 (butene) can all undergo hydroboration.
Alkenes can react with BH₃ in a hydroboration reaction. In this reaction, BH₃ adds to the double bond of the alkene to form an intermediate called an organoborane. The organoborane can then react with water or another compound to yield an alcohol or other product.