Phase transitions in (C H N ) [SnCl ]Cl ·1.5H O crystal, studied by NMR and infrared spectroscopy.

The (C H N ) [SnCl ]Cl ·1.5H O complex is a new member of the family of hybrid organic-inorganic perovskite compounds. It exhibits two order-disorder phase transitions with changes in the conformation of aromatic cations at the two transition temperatures 360 and 412 K.