in dichloromethane addn. of soln. of Cp2Co in CH2Cl2 to suspn. of InOTf in CH2Cl2; pptn., filtration, rinsing of ppt. with CH2Cl2; removal of solvent in vac.; slow evapn of concd. CH2Cl2 soln.; crystn.;

in toluene addn. of toluene to mixt. of InOTf and (Cp2Fe)(PF6); stirring under N2 overnight; filtration, slow concn., crystn.;