1: cyclopentadien-5-yldiphenylphosphine; cyclopenta-1,3-diene With n-butyllithium in tetrahydrofuran T=-78°C; 0.25 h; Inert atmosphere; 2: cobalt(II) dibromide in tetrahydrofuran T=-78 - 20°C; 16 h; Inert atmosphere; 3: NH4PF6 Further stages;

in acetonitrile a soln. of the starting Ir-complex in MeCN is added via cannula to a soln. of cobaltocene in MeCN; after 2 h the solvent is removed in vac., the residue is extd., filtd., evaod. to dryness, the powder is heated at 40°C (1 mmHg) for 4 h, elem. anal.;

1: Na[Cp]; cobalt(II) chloride in tetrahydrofuran T=-40 - 20°C; Schlenk techniqueInert atmosphereSonication; 2: With air in water 4 h; 3: KPF6 in water

hydrogenchloride; air in water; dimethyl sulfoxide byproducts: TlCl; Sonication; dark, N2 atmosphere; addn. of Co-salt to suspn. of Tl-salt, stirring, sonication (room temp., 24 h), bubbling of air (2 h), addn. of aq. HCl, filtration, extn. of filtrate (hexanes), addn. of NH4PF6 (pptn.); cooling, storing (overnight, refrigerator), filtration, washing (little H2O), dissolving (acetone), warm H2O addn. (pptn.), cooling; elem. anal.;

in dichloromethane under N2 atm. soln. CoCp2 in CH2Cl2 was added dropwise at room temp. to slurry (((CpCo(C5H5B))2C6H4)(PF6)2 in CH2Cl2 and stirred overnight; ppt. was filtered off, ether was added to filtrate, ppt. was filtered off, solvent was removed in vacuo, residue ws dried in vacuo;

water in further solvent(s) further solvent: pyrrolidine; hydrolysis with H2O after end of reaction; pptn. with (PF6)(1-);;

in dichloromethane a suspn. of Co(cp)(hmbz)(PF6)2 in CH2Cl2 treated with 1 equiv. of Co(cp)2 at ambient temp. under N2;; fractional crystn. from CH2Cl2/toluene;;

in dichloromethane a suspn. of Co(pmcp)(bz)(PF6)2 in CH2Cl2 treated with 1 equiv. or Co(cp)2 at ambient temp. under N2;; fractional crystn. from CH2Cl2/toluene;;

H2SO4 in tetrahydrofuran treating Co(C5H5)2 with excess C6H5MgBr in THF (cooling), hydrolysis with aq. H2SO4 after replacement of THF by deaerated benzene (pptn. from aq. phase yields (Co(C5H5)2)PF6 on repptn. from acetone by ether), evapg. the mother liquor to dryness;; dissolving residue in ethanol, concg. (pptn.);;

HCl in tetrahydrofuran; water; toluene stirring (25°C, 15 min), evapn., toluene and H2O addn., air bubbling (10 min), filtering, extg. (H2O), washing (ether), pptn. on KPF6 soln. (H2O) addn. (stirring), filtering, washing (ether), drying (CaSO4, 2 d); chromy. (alumina, Me2CO, 1percent MeOH / Me2CO), evapn., washing (ether), drying (vac.);