Moessbauer Spectroscopic Studies of Tin(IV) Halide Adducts with Ruthenocene and with Ferrocenophanes

Article abstract of DOI:10.1246/bcsj.59.2109

Adducts of tin(IV) halide with <2>ferrocenophane were prepared by treating SnX4 (X=Cl or Br) with <2>ferrocenophane in hexane.The adducts were studied by means of 57Fe- and 119Sn-Moessbauer spectroscopy and other physicochemical measurements.Anomalously large quadrupole splittings (3.49 mm s^-1 for <2>ferrocenophane-1.5SnCl4 adduct and 3.47 mm s^-1 for <2>ferrocenophane-1.5SnBr4 adduct, both at 78 degK) found in the 57Fe-Moessbauer spectroscopy and organotin(IV) species (e.g., isomer shift value, 2.14 mm s^-1 for the <2>ferrocenophane-1.5SnCl4 adduct and 2.10mm s^-1 for the <2>ferrocenophane-1.5SnBr4 adduct, both at 78 degK) found from the 119Sn-Moessbauer spectroscopy suggest that a direct chemical bonding between Fe and Sn atoms is formed in the <2>ferrocenophane adducts, as the Ru-Sn bonding in the ruthenocene-1.5SnCl4 adduct (isomer shift value, 2.08 mm s^-1 at 78 degK).