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Crown‐Ether‐Like Structures Derived from a Ti 8 O 8 (Carboxylate) 16 Metallacycle
Author(s) -
Artner Christine,
Czakler Matthias,
Schubert Ulrich
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201302892
Subject(s) - metallacycle , carboxylate , methacrylate , crystallography , titanium , chemistry , ether , polymer chemistry , dimer , materials science , stereochemistry , polymerization , x ray crystallography , polymer , organic chemistry , physics , diffraction , optics
Mixed‐metal clusters have been obtained from the reaction of titanium alkoxides with either strontium or lead acetate and methacrylic acid. The structures of the clusters are derived from the metallacycle Ti 8 O 8 (methacrylate) 16 . The Sr and Pb atoms in Sr 2 Ti 8 O 8 X 2 (OOCMe) 2 (methacrylate) 16 (X: acetate or O i Pr) and Pb 2 Ti 8 O 8 (OBu) 2 X 2 (methacrylate) 16 (BuOH) 2 (X: acetate or methacrylate) occupy the central cavity of the Ti 8 O 8 ring. In addition to the crown‐ether‐like coordination of the ring oxygen atoms to the Sr or Pb atoms, bridging carboxylate ligands support the coordination of the latter atoms. In the compound Pb 2 Ti 6 O 5 (O i Pr) 3 X(methacrylate) 14 (X: O i Pr or methacrylate), the lead atoms are coordinated by a fragment of the Ti 8 O 8 (methacrylate) 16 metallacycle.