Source of material To asolution of K 2 PtCl 6 (0.5832 g, 1.200 mmol) in H 2 O(50 ml) was added 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz, 0.1249 g, 0.400 mmol; C 18 H 12 N 6 ), and the mixture was stirred at room temperature for 24 h. During the reaction, the yellow precipitate formed. The precipitate was separated by filtration, washed with water and acetone, and dried at 50 °C, to give ayellow powder (0.2566 g). Crystals suitable for X-ray diffraction analysis were obtained by slow evaporation from an N,N-dimethylformamide solution at 50 °C.