10. Addition Reactions

Which of the following is the major organic product formed when 1-hexyne undergoes hydroboration–oxidation (using ${\mathrm{BH}}_3$ followed by $H{2}_O/\mathrm{OH}/H{2}_O{2}_{}$)?

Which of the following alcohols can be synthesized selectively by hydroboration-oxidation of an alkene?

Which of the following best describes the first step in the hydroboration mechanism when an alkene reacts with $B_{2}H6$ (diborane) in the presence of tetrahydrofuran (THF)?

Which of the following reagents can be used to convert $1-\mathrm{pentyne}$ into an $\mathrm{aldehyde}$ via hydroboration-oxidation?

Indentify the mechanism of reaction and predict the product.

Predict the product of the following reaction.