water in tetrahydrofuran under N2, soln. of Mn-complex was treated with benzaldehyde;

in tetrahydrofuran under N2, Fe(CO)5 was added to soln. of Mn-complex in THF at -78.degreee.C, warmed to room temp.; monitored by IR spectra;

in not given Kinetics; decompd. at -15-21°C;

in tetrahydrofuran under N2, CF3SO3F was added to soln. of Mn-complex in THF at -23°C, warmed slowly to room temp., cooled to -23°C, warmed to room temp.; solvent removed by rotary evapn., chromd. on silica gel (ethyl acetate-hexane);

in tetrahydrofuran under N2, soln. of Mn-complex in THF was stirred for 0.5 h at room temp., solid Ph3SnCl was added, stirred for 0.5 h; solvent removed by rotary evapn., chromd. on silica gel (ethyl acetate-hexane), solvent removed by rotary evaporation, dissolved in hexane, placed in freezer for 2 d, filtered, vac. dried;

in tetrahydrofuran under N2, soln. of HMn(CO)5 in THF was cooled to -23°C, added tosoln. of formyl-complex in THF (-23°C), warmed slowly to room temp., Ph3SnCl was added, stirred for 1 h; solvent removed by rotary evapn., vac. sublimed at 60°C, residueeluted through silica gel column with ethyl acetate-hexane;

in tetrahydrofuran under N2, soln. of Mn-complex in THF was freeze/thaw degassed, warmed to -40°C for 10 min and then to 24°C for 1 h, Ph3SnCl was added, stirred overnight; solvent removed under vac., chromd. on silica gel in benzene;

triethyl borane in not given Kinetics; byproducts: H2; decompd. at 15°C, inhibited by (C2H5)3B;

water in tetrahydrofuran under N2, soln. of Mn-complex was treated with benzaldehyde;