Crystal structure and properties of potassium hydroxostannate(IV) K2Sn(OH)(6)

A single-crystal X-ray investigation of potassium hydroxostannate(IV) K2Sn(OH)(6) showed rhombohedral space group R.(3) over bar with a = 6.545(1) Angstrom and c = 12.808(3) Angstrom. The Sn atom is surrounded by a slightly distorted octahedral array of six Q atoms with Sn-O 2.068(1) Angstrom. [Sn(OH)(6)](2-) complex anions at e linked by O-H . . .O hydrogen bonds 2.894(2) Angstrom long. An X-ray diffraction powder pattern was indexed. IR absorption bands were assigned. Thermolysis of the hydroxostannate proceeds in three stages at 235, 362, and 495 degreesC to split 2, 1/3, and 2/3 water molecules, respectively.