Heterobimetallic tin(II) oxido clusters of the type [{Sn6(μ3-O)4(μ3-OCH2R)4} {W(CO)5}4] and [{Sn5(μ3-O)2(μ-OCH2R)4(μ3-OCH2R)2}{Fe(CO)4}2

Abstract

Reaction of the tin(II) alkoxides bis(2-methoxyphenylmethanolate)tin(II) (1) and bis(2,4-dimethoxyphenylmethanolate)tin(II) (2) with [W(CO)5(thf)] and [Fe2(CO)9], respectively, gave the heterobimetallic tin(II) oxido clusters [{Sn6(μ3-O)4(μ3-OCH2R)4}{W(CO)5}4] [3, RC6H4(OCH3)-2); 4, RC6H3(OCH3)2-2,4] and [{Sn5(μ3-O)2(μ-OCH2R)4(μ3-OCH2R)2}{Fe(CO)4}2] [5, RC6H3(OCH3)2-2,4] which were isolated reproducibly with fair yield as a result of partial hydrolysis in the presence of moisture. The metal oxido clusters are composed of polynuclear tin(II) oxido cages entrapped by arylmethanolato ligands and coordinated to metal carbonyl moieties via lone pairs of electrons at tin. The compounds were analyzed by single crystal X-ray diffraction analysis (1, 4·2THF and 5), elemental analyses, ATR-IR spectroscopy and 1H, 13C{1H} and 119Sn{1H) NMR spectroscopy in solution as well as in solid state.