Novel alkoxo-bridged lanthanide(III) dinuclear complexes Na4[Ln2(μ-dpta-O)2] (Ln=GdIII, HoIII, and YbIII; H4dpta-OH=1,3-diamino-2-hydroxypropane-N,N,N′,N′-tetraacetic acid) were prepared and characterized. X-ray analysis for the Yb(III) complex indicated that each Yb atoms, which is surrounded by four terminal O atoms from carboxylate, two bridged O atoms from alkoxo, and two N atoms in two different dpta-O ligands, is situated in an eight coordinate geometry.

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