57Fe-Moessbauer and 13C-CP-MAS NMR spectroscopic studies of reaction products of ferrocenylruthenocene with Lewis acids

Adducts of ferrocenylruthenocene (I), ferrocenylruthenocenylmethane (II) and biruthenocene (III) with Lewis acids were studies by means of 13C-CP-MAS NMR and 57Fe- and 119Sn-Moessbauer spectroscopies. Large low-field shifts found in the 13C-CP-MAS NMR and large quadrupole splittings (Q.S.) found in the 57Fe-Moessbauer and covalently bonded tin(IV) species found in the 119Sn-Moessbauer spectroscopic studies on the adducts suggest the presence of a direct chemical bonding between the central metal atoms in the metallocenes and the Lewis acids. 7 references, 2 figures