Poly[bis­(1,3-dimethyl­imidazolidin-2-one)(μ₂-2,5-dioxidoterephthalato)zirconium(IV)]

In the title coordination polymer, [Zr(C₈H₂O₆)(C₅H₁₀N₂O)₂]_n, the Zr^IV atom (site symmetry 2) is coordinated by two O,O′-bidentate 2,5-dioxidoterephthalate (DHTP⁴⁻) ligands and two O-bonded 1,3-dimethyl-2-imidazolidinone (DMI) ligands (the latter in a cis orientation) in a distorted ZrO₆ octa­hedral geometry. The deprotonated hy­droxy and carb­oxy O atoms of the DHTP⁴⁻ ligand chelate the Zr^IV ion via a six-membered ring; the dihedral angle between the carboxyl­ate group and the aromatic ring is 14.46 (11)°. The DHTP⁴⁻ ligand is completed by crystallographic inversion symmetry and coordinates to two Zr^IV atoms, thereby forming polymeric zigzag chains propagating in [001].

Poly[bis­(1,3-dimethyl-1,3-diazinan-2-one)(2,5-dioxidoterephthalato)zirconium(IV)]

In the title coordination polymer, [Zr(C₈H₂O₆)(C₆H₁₂N₂O)₂]_n, the Zr^IV atom, which lies on a crystallographic twofold rotation axis, is coordinated by two O,O'-bidentate 2,5-dioxidoterephthalate (DHTP^4-) ligands and two O-bonded 1,3-dimethyl-1,3-diazinan-2-one (DMPU) ligands (the latter in a cis orientation) in a distorted ZrO₆ octa­hedral geometry. The deprotonated hy­droxy and carb­oxy O atoms of the DHTP^4- ligand chelate the Zr^IV ion via a six-membered ring; the dihedral angle between the carboxyl­ate group and the aromatic ring is 19.94 (11)°. The DHTP^4- ligand is completed by crystallographic inversion symmetry and coordinates to two Zr^IV atoms, thereby forming polymeric zigzag chains propagating in the c-axis direction.