Hydroxidien

Hydroxidien is a term that does not correspond to a widely recognized chemical entity in standard chemistry. Its meaning varies between sources, and there is no single accepted definition.

One common interpretation is that hydroxidien is a nonstandard term for the hydroxide ion, OH−, or for aqueous hydroxide solutions in languages where "hydroxid" is the root. However, the standard nomenclature uses hydroxide or hydroxide ion in English.

In other contexts, particularly in fictional or didactic materials, hydroxidien may be used to refer to a hypothetical neutral molecule containing hydroxyl groups or a class of metal-hydroxide coordination compounds. These usages are not standardized and should be specified by the author or source.

Because of its ambiguity, researchers and students should rely on established terms and verify definitions when encountering hydroxidien in a text. When in doubt, consult the source’s glossary or a standard chemistry reference to determine which concept is being referred to.

See also: Hydroxide; Hydroxide ion; Metal hydroxide; Hydroxyl group.