hydrogenchloride; sodium amalgam in not given reduction of complex with Na#Hg, subsequential addn. of ClCO2Et, HCl, NH4PF6;

CO in dichloromethane; acetonitrile dissolving dimer in CH2Cl2 : CH3CN 1:1; bubbling CO through soln.; adding an excess of NOPF6 in several portions (N2-atmosphere); color changedfrom deep brown to yellow brown; crystn.; removing solvents; washing (ether); extn. (acetone); filtration in air; pptn. by addn. of Et2O at -20°C;

aluminium trichloride; bromine in decalin The soln. of complex and AlCl3 in decalin was heated to 100°C under N2 atm., Br2 was added, stirred for 10 min, heated with stirring for3 h at 150°C, cooled to about 30°C; water layer was addeda soln. of NH4PF6 in water;; ppt. was filtered, dissolved in CH3NO2, dried over MgSO4, concd., Et2O was added; elem. anal.;;

in 1,2-dichloro-ethane equimolar mixt. of complexes refluxed for 1 h; extd., chromd.;

in dichloromethane under N2, excess Cp(CO)2FeCH=CH2 added to cold (-78°C) CH2Cl2 soln. contg. Cp(CO)2FeCH2(1+), kept for 10 min at low temp., warmed to 20°C with stirring; ppt. filtered on Celite, washed with degassed acetone, evapd. (25 mm, 20°C), extd. with ether, residue dissolved in acetone, filtered slowly into excess ether, ppt. collected, washed with ether, dried in vac.(1E-2 mm, 2 h);

in dichloromethane a dry soln. of CH2N2 in CH2Cl2 was added at -78°C under inert atmosphere to a slurry of Fe-complex in CH2Cl2, soln. was stirred for 30 min at -78°C and allowed to warm to room temp.; solvent was evapd. under vac., residue was recrystd. from CH2Cl2-Et2O to give a 95:5 mixt. of the two complexes (total yield 42percent); (1)H NMR identification;

in tetrahydrofuran addn. of AgPF6*2C4H8O2 to soln. of complex in dried and distilled solvent, molar ratio of educts: AgPF6/complex=2/1, 2h, darkness, room temp.; reaction detected by IR;

α-methylstyrene or 2,3-dimethyl-1,3-butadien in 1,2-dichloro-ethane byproducts: N-phenyl-2-phenyl-allylamine or Me2C4H4NO(Ph); High Pressure; 120°C, 41 atm CO;

in acetonitrile addn. of AgPF6*2C4H8O2 to soln. of complex in dried and distilled solvent, molar ratio of educts: AgPF6/complex=2/1, <30s, darkness, room temp.; reaction detected by IR;

in dichloromethane byproducts: Ph3CH; N2; mixing at -78°C, (molar ratio 1:1), warming to 22°C (during 1 h, stirring, pptn.); further product: Cp(CO)2FeCH3; filtration, washing (CH2Cl2), drying (vac.); contains traces of Cp(CO)3FePF6;