Crystal Structure of Tetramethylammonium Sulfate Tetrahydrate

Tetramethylammonium sulfate tetrahydrate is orthorhombic, Pnam, with a = 15.438, b = 13.832, c = 7.923 Å at −26°C. The structure contains ordered cations in channels formed by hydrogen-bonded chains of water molecules cross linked by interaction with the sulfate ions which are disordered.