Syntheses and crystallographic characterizations of trinuclear (µ3-O) zirconium complexes

The new trinuclear complex [{(η5-C5H5)2ZrO}3(µ3-O)]5 shows unexpected interatomic distances and angles and a planar µ3-O, while the related trinuclear zirconium cation cluster [{(C5H5)Zr}3(µ3-O)(µ-OH)3(µ2-HCO2)3]Cl· HCONMe2·0.5H2O 7 exhibits a pyramidal µ3-O.