Beginning with the unexpected formation of Y5O(OPri)(13) in the reacti
on of yttrium with isopropyl alcohol, the preparation, properties and
structural characterization of homo- and hetero-metallic oxo-alkoxides
continue to provoke keen interest, revealing considerable diversifica
tion in structural features with mu(2)- to mu(6)-oxo bonding modes. Th
is review highlights developments in the synthetic procedures, structu
ral features, potential applications, future possibilities and mechani
stic approaches for the formation of this fascinating and important cl
ass of heteroleptic alkoxide complexes.