in tetrahydrofuran a soln. of the borane in THF is added dropwise at -20°C to a soln. of NaRe(CO)5 in THF, stirred at this temp., stirred at 20°C, left to stand; the products are detected by TLC;

((C2H5)4N)Cl in acetonitrile Electrolysis; electrolysis process were run in galvanostatic regime ( current 100 mA,catode - Pt, anode - Mg, supporting electrolyte - NEt4Cl); evapd. in vac., treated with hot C6H6, filtered, chromd. (SiO2, C6H6), dried, recrystd. (C6H6/hexane);

in neat (no solvent) heated for 6 h at 350°C; extracted with ether, extract evaporated, residue sublimed; GLC;

in tetrahydrofuran a soln. of the borane in THF is added dropwise at -20°C to a soln. of NaMn(CO)5 in THF, stirred for 2 h at this temp., stirred for 1 h at 20°C, left to stand for 16 h; the soln. is decanted from the ppt., the solvent is evapd.,, Hg(Mn(CO)5)2 is obtained by crystn. from benzene-THF, the mother liquor is evapd., the residue is chromd.;