Methacrylate-Substituted Mixed-Metal Clusters Derived from Zigzag Chains of [ZrO8]/[ZrO7] and [TiO6] Polyhedra

Reaction of titanium butoxide and zirconium butoxide with methacrylic acid in different molar ratios results in the formation of the mixed-metal clusters Ti4Zr4O6(OBu)4(OMc)16, Ti2Zr4O4(OBu)2(OMc)14, Ti4Zr2O4(OBu)6(OMc)10, and Ti2Zr6O6(OMc)20 (OMc = methacrylate). The molecular structures of these clusters have been determined by single-crystal X-ray diffraction analysis. They are based on a common structural motif, namely a zigzag chain comprising two terminal [TiO6] octahedra and two or four central [ZrO8] dodecahedra or [ZrO7] pentagonal bipyramids sharing common edges. Two additional [TiO6] octahedra or [ZrO8] dodecahedra are condensed at the flank of the main chain.