## Organic Chemistry (8th Edition)

Reacting BH$_3$ as reactant and THF with an alkene: Add H and BH$_2$ to the vinylic carbons. H is added to the more substituted carbon while BH$_2$ is added to the less substituted carbon. The stereochemistry: H and BH$_2$ are added in syn fashion, meaning they are in the same plane.