Dihydrogen monoxide parody oxygen atom. Literally, the term "dihydrogen monoxide" means "two hydrogen, one oxygen", consistent with its molecular formula: the prefix "" in "dihydrogen" means "two", the prefix "" in "monoxide" means "one", and an oxide is an oxygen atom attached to another atom in an ionic compound. Using chemical nomenclature, various names for water are in common use within the scientific community. Some such names include "hydrogen oxide", as well as an alkali name of "hydrogen hydroxide", and several acid names such as "hydric acid", "hydroxic acid", "hydroxyl acid", and "hydroxilic acid". The term "hydroxyl acid" used in the original text
Dihydrogen complex some cases, hydrogen ligands are usefully characterized by X-ray crystallography, but often the presence of metals, which strongly scatter X-rays, complicates the analysis. The triangular MH subunit has six normal modes of vibration, one of which is mainly of ν character. In free H, this very strong bond absorbs at 4300 cm, whereas in dihydrogen complexes the frequency drops to around 2800 cm. Two preparation methods involve the direct reactions with H gas. The first entails the addition of H to an unsaturated metal center, as originally reported for W(CO)(P-i-Pr)(H). In such cases, the unsaturated complex in fact features an