57Fe-Moessbauer and 13C-Cp-Mas NMR Spectroscopic Studies of Reaction Products of Ferrocenylruthenocene with Lewis Acids

Abstract

Adducts of ferrocenylruthenocene (I), ferrocenyl-ruthenocenylmethane (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.