hydrogen-metal exchange

Metalation is a chemical process where a metal atom is introduced into an organic molecule, often through a hydrogen-metal exchange. This process is valuable for removing hydrogen atoms (as H⁺) and studying the acidity of weak acids like hydrocarbons.1

Hydrogen-metal exchange is a key aspect of metalation. For instance, reacting benzene with ethylsodium can produce phenylsodium and ethane, demonstrating the replacement of a hydrogen atom with a sodium atom.1

Hydrides are compounds where hydrogen combines with another element. They can be ionic, metallic, or covalent, depending on the chemical bond involved. Saline hydrides, like those of alkali and alkaline-earth metals, contain the hydride ion (H⁻) and can be sources of hydrogen gas when reacting with water. Metallic hydrides, formed by transition metals, exhibit metallic properties like electrical conductivity. Covalent hydrides involve shared electron pairs between hydrogen and nonmetals.2

Hydrogenation is a chemical reaction where hydrogen adds to a molecule, often with a catalyst. This is industrially important for producing edible fats, refining petroleum, and creating liquid fuels from coal.3