in o-di-fluorobenzene (N2); glovebox; Fe complex (1 equiv.) was added to soln. of Rh complexesin fluorobenzene; kept at room temp. overnight; solvent removed (vac.); washed (pentane); extd. (fluorobenzene); filtered; solvent removed (vac.); elem. anal.;

 in  benzene-d6  Ar was bubbled through soln. of Rh complex in C6D6 for 30 min in NMR tube;