C2H5OH; HCl in further solvent(s) under N2, Ru complex suspended in Et3Al, mixt. stirred at 75°C for 2 h, mixt. cooled to -10°C, ethanol slowly added, stirred at room temp. for 3.5 h; solvent removed, residue dissolved in CH2Cl2, added concd. HCl, org. layer sepd., dried, recrystd. from CH2Cl2/ethanol;

C2H5OH; HCl in further solvent(s) under N2, Ru complex added to Et3Al diluted with CH2Cl2, cooled to -78°C, ethanol slowly added, evapd. at 50°C, residue dissolvedin CH2Cl2, cooled to -78°C, treated with HCl; org. layer sepd., dried at -78°C, solvent evapd., recrystd. frombenzene, elem. anal.;