Hydrided

Hydrided is the past participle of hydridize or hydriding, used to describe a chemical entity that has been supplemented with a hydride (H−) or that has undergone a reaction delivering a hydride to a substrate. In practice, hydrided compounds may be metal hydrides formed when a metal absorbs hydrogen, or organic and inorganic species that have received a hydride fragment during a reduction or related process.

In materials science and metallurgy, hydriding refers to the absorption of hydrogen into a metal lattice to form a metal hydride, such as palladium hydride or titanium hydride. These hydrides are studied for hydrogen storage, purification, and electrochemical applications. The hydriding/dehydriding equilibrium depends on temperature, pressure, and the metal’s crystal structure.

In organic and inorganic synthesis, hydriding can describe hydride-transfer reductions, where a hydride donor delivers H− to a substrate. Reagents such as sodium borohydride, lithium aluminum hydride, or catalytic systems can hydridize carbonyl compounds to alcohols or reduce other functionalities. When a substrate has accepted such a hydride, it can be described as hydrided.

Distinctions: Hydriding versus hydrogenation. Hydriding often emphasizes transfer of a hydride ion or the formation of a metal hydride, whereas hydrogenation commonly refers to addition of H2 across unsaturated bonds. Because hydrided is less common in modern prose, many authors prefer hydrogenated or reduced with a hydride donor to avoid ambiguity.