in ethanol; water 2.03333 h; Heating / reflux;

in methanol; water a soln. of bipy and K2C2O4 in 1:1 water-MeOH was added under inert atm. to a soln. of Ru-complex in hot water, mixt. was refluxed for 24 h; according to the adapted procedure by C. F. Liu, N. C. Liu and J. Bailar, Inorg. Chem., 1964, 1197; filtd., evapd., residue was recrystd. from MeOH; (1)H NMR spectral data;