Oligomeric alkoxides containing more than 6 nuclei

Oligomeric alkoxides containing more than 6 nuclei 

Oligomeric alkoxides containing more than 6 nuclei nearly always incorporate oxogroups and are represented by the following structural types 

Goso-polyhedra ( cluster structures with or without a centering polydentate group). 

Molecules containing cubane-like cores in their structures are represented by 2 types. To the first one belongs [Ii4Ti4( iJ-0)2( lJ-0)2(0Pri)12] built up of 2 [Li2Ti203(OR)] cubes sharing a common [Ti2( X5-0)2] face, connected also by the outer [TiO(OR)4] groups [970]. 

A number of examples represent a structural type, where the 8 faces ofthe central octahedral [MJ core are capped by alternating [t3-OR and octahedral [([i4-0)M (0R)5] groups. Among those are [Pb6Nb404(0Et)24] [1253], [Sr6Ti4O4(OPr )20] [1519], and [Ni6Sb404(0Et)16(Et0H)4] [140], 

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