in cyclohexane an equimolar mixt. of educts in cyclohexane was stirred at room temp. for 3 d;; after filtration and evapn. in vac., residue dissolved in hexane, chromy. (silica gel, hexane/benzene (1:1)): 1. yellow, Co-complex; 2. red-brown (recrystn., hexane, -30°C), NiGeCo3-cluster; with hexane/benzene (4:1): red (evapn.) Ni-complex;;

triphenylphosphine in tetrahydrofuran byproducts: KI; N2-atmosphere; slight excess of KCo(CO)4, room temp.;

in presence of CO;; high yield;;

in presence of CO;; high yield;;

react. under CO at 0°C and at 25°C with isomerisation;;

in water react. in aq. soln. under N2 or CO;;

in water react. in aq. soln. under N2 or CO;;

react. under CO at 0°C and at 25°C with isomerisation;;

in tetrahydrofuran under dry N2, Schlenk setup, soln. of KCo(CO)4 (6 mmol) added dropwise to soln. of W complex (2 mmol) at -78°C, stirred for 30 min, warmed to room temp., stirred for 14 h, evapd.; sublimated at 50°C in vac. to remove W(CO)6, chromd. (silica, hexane, hexane/toluene), elem. anal.;