Hydroboration

Part of speech: noun

Definitions

1. The chemical addition of a boron-hydrogen bond across an alkene or alkyne, forming an organoborane intermediate used in organic synthesis
2. A reaction in which borane or a related boron compound adds to an unsaturated carbon bond, producing an organoboron product that chemists often use to make alcohols
3. The process of adding boron and hydrogen across a double or triple carbon bond, a key step in preparing organoborane compounds in laboratory synthesis

Etymology: Hydroboration is a chemist's coinage, built from two pieces that each have their own history. The first, "hydro-", comes from the Ancient Greek "hūdōr," meaning water, and it reaches English as a combining form that appears in countless scientific terms. The second, "boration," is formed from "boron," the element, with the suffix that turns it into a process noun for adding a compound across a bond. Put together, the word names a reaction in which a boron-hydrogen compound is added across a carbon-carbon double or triple bond, so that a hydrogen atom and a boron atom attach to the two carbons. The name thus records the two additions in its own construction: hydrogen first, boron second, joined as a single process. Because the term is a transparent compound of standard scientific parts, the word itself carries no older meaning to uncover; its sense is exactly the reaction it names.