A solution of 2gb (0.525 g, 3.0 mmol) in methanol
30 cm3) was added with stirring to a slurry of Co(NH3)4CO3]NO3 (0.249 g, 1 mmol) in methanol (30m3) and 2 mmol of HCl (2 cm3, 1.029 N). The mixture was refluxed for 6 h. A red solution was obtained,which gave a reddish precipitate and after 2 days redrystals appeared. The precipitate was isolated by vacuum filtration and its elemental analysis correspondedo [Co(2gb)3]Cl2(NO3)·H2O(1a). Yield 0.652 g, 85.6%.UV–Vis (DMSO): lmax 510 nm (o 510 mol 1 dm3