in acetonitrile mixed; followed by IR, removal of solvent, extn. (hexane or benzene), sepn. by column or thin-layer chromy.;

in dimethyl sulfoxide 1.05 equiv. of Fe-compd. was added to Re-complex in DMSO, heating at 130°C for 3 h 20 min, at same molar ratio at 160 °C for 0.5 h 12 percent yield was observed; cooling to room temp., H2O was added, extn. twice with CH2Cl2, org. phase was washed, dried (MgSO4), filtered, concd., chromy. (silica plate, petroleum ether:EtOAc (5:1);;

in acetonitrile mixed; followed by IR, removal of solvent, extn. (hexane or benzene), sepn. by column or thin-layer chromy.;

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in acetonitrile under N2 or Ar; Re complex reacted with Fe complex in MeCN at 25°C; not isolated; monitored by IR spectra;