hydrogenchloride; tetrabutylammomium bromide in ethanol n-Bu4NReO4 was refluxed in benzoyl chloride for 1.5 h, HCl saturated soln. of Bu4NBr in ethanol was added to a cooled mixture, refluxed for 1 h, under positive pressure of N2; concn., filtration, washing a ppt. with ethanol and diethyl ether, ddying in vac.; elem. anal.;

hydrogenchloride in ethanol complex was refluxed in benzoyl chloride for 5 h, HCl saturated soln. of Bu4NBr in ethanol was added to a cooled mixture, refluxed for 1 h, under positive pressure of N2; concn., filtration, washing with ethanol, diethyl ether, drying in vac.;

hydrogenchloride in ethanol complex was refluxed in benzoyl chloride for 1.5 h, HCl saturated soln.of Bu4NBr in ethanol was added to a cooled mixture, refluxed for 1 h, under positive pressure of N2;

acetonitrile in acetonitrile react. (Bu4N)2(Cl4Re2Cl3(dpa)Cl3Re2Cl4) with CH3CN in presence excess n-Bu4NCl at room temp. for 2 h; diethylether added, product recrystd. from methanol/conc.HCl;

hydrogenchloride in ethanol KReO4 was refluxed in benzoyl chloride for 5 h, HCl saturated soln. of Bu4NBr in ethanol was added to a cooled mixture, refluxed for 1 h, underpositive pressure of N2; concn., addition of diethyl ether, filtration, washing a ppt. with ethanol and diethyl ether, addition of hot methanol, filtration into conc. HCl, evapn. by boiling, filtration, washing a ppt. with ethanol, Et2O, drying in vac.; elem. anal.;

BH3*THF in diethylene glycol dimethyl ether CO-atmosphere; addn. of Bu4NCl and BH3*THF to Re-compd., bubbling CO at 110°C for 10 h, cooling to 50°C, Et4NCl addn, stirring for1-2 h; collection (filtration), drying, EtOH addn., stirring for 2 min, collection (filtration), washing (cold EtOH); further crop obtainable from mother liquor by evapn. and treatment with THF;

BH3*THF in diethylene glycol dimethyl ether byproducts: H3BO3; N2-atmosphere; addn. of Bu4NCl and BH3*THF to Re-complex, bubbling CO at110°C for 10 h, cooling to 40°C, addn. of Et4NCl, stirrin g for 12 h; collection (filtration), washing (Et2O), drying, stirring with EtOH, collection (filtration); elem. anal.;

in tetrahydrofuran; hydrogenchloride (under Ar) addn. of soln. of VCl2 in aq. HCl to soln. of Re-complex and ammonium salt in THF (room temp.), stirring (2 h); filtration, washing (MeOH), drying (vac.); elem. anal.;

CO; CH3CN in acetonitrile Re-complex in CH3CN was subjected 100 atm of CO at 90°C for 8 h,mixt. was cooled to room temp.; removed under Ar, filtered, taken to dryness in vac., residue was placed on silica gel column, eluted with toluele and THF, evapd., solid was redissolved in CH3CN, cooled to -20°C;