in tetrahydrofuran byproducts: NaCl; N2, to a soln. of Rh comp. added Na compd., stirred for 30 min at room temp.; solvent removed (vac.), treated with cold hexane, filtered, solvent evapd.;

in toluene byproducts: NaCl; (N2); standard Schlenk technique; mixt. of Rh complex and Na(acac) in toluene was heated with stirring at 40°C for 3 h; filtered; tolune removed (vac.); extd. (hexane); filtered through pad ofCelite; hexane removed (vac.); elem. anal.;