What is "hexamethylphosphoramide"

n. (context chemistry English) An organophosphorus compound with the chemical formula [(CH₃)₂N]₃PO, a useful polar aprotic solvent and additive in organic synthesis.

Hexamethylphosphoramide, often abbreviated HMPA, is a phosphoramide (i.e. an amide of phosphoric acid) having the formula [(CH)N]PO. This colorless liquid is a useful polar aprotic solvent and additive in organic synthesis.