Tetraaquabis(μ2-4,4′-bipyridine)dodecakis(μ2-2-methylprop-2-enoato)octakis(2-methylprop-2-enoato)tetraytterbium(III)tetrazinc(II)

Abstract

The asymmetric unit of the title compound, [Yb4Zn4(C4H5O2)20(C10H8N2)2(H2O)4], contains half of a centrosymmetric octanuclear molecule in which each ZnII ion is four-coordinated by three O atoms from three 2-methylprop-2-enoate (L) ligands and one N atom from a 4,4′-bipyridine (bipy) ligand in a distorted pyramidal geometry. The two independent YbIII ions, each coordinated by eight O atoms in an irregular geometry, exhibit different coordination environments, viz. one water molecule, five bridging bidentate and one chelating bidentate carboxylate groups for one YbIII ion, and one water molecule, three bridging bidentate and two chelating bidentate carboxylate groups for the other YbIII ion. In the crystal structure, intermolecular O—H...O and C—H...O hydrogen bonds help to establish the packing.