Synthesis and reactivity of [2]ferrocenophanes with C-Ge and C-Sn bridges

Article abstract of DOI:10.1021/om049650s

The synthesis, characterization and reactivity of carbogerma[2] ferrocenophanes, (η-C₅Me₄)Fe(η-C₅H ₄)CH ₂GeR₂, 11 (a,R=Ph;b, R=Me) and carbostanna[2]ferrocenophanes, (η-C₅Me₄)Fe(η- C₅H₄)CH ₂SnR₂, 12 (a,R=tBu; b, R=Mes; c, R=Me) were investigated. It was found that x-ray diffraction analysis of these species possesses moderate ring-tilt with values in the range α=10.99(2)-11.81(5)° for 11a,b and α=6.64(2)-7.5(1)° for 12a-c. Reactions of 11b and 12a with strong acids resulted in the formation of ring-opened species. Treatment of 12b with HCl resulted in selective Sn-Mes bond cleavage.