in diethyl ether; dichloromethane In inert atmosphere, dropwise addn. of AgBF4 soln. in ether to Fe-complex in CH2Cl2, orange soln. immediately turns brown and tubid, stirring (1.5 h, room temp.).; Dilution of suspn. with MeOH, filtn. through Celite to remove Ag, evapn. of filtrate, dissolving of brown residual solid in CH2Cl2, crystn. by vapor-phase diffusion with ether, elem. anal.;