Poly[[pentaaqua(μ4-pyridine-2,4,6-tricarboxylato)(μ3-pyridine-2,4,6-tricarboxylato)disamarium(III)] monohydrate]
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چکیده
The asymmetric unit of the title compound, {[Sm(2)(C(8)H(2)NO(6))(2)(H(2)O)(5)]·H(2)O}(n), contains two independent Sm(III) ions, two pyridine-2,4,6-tricarboxyl-ate (ptc) ligands, five aqua ligands and one lattice water mol-ecule. One Sm(III) ion is nine-coordinated by one N and five O atoms from the three ptc ligands and three aqua ligands in a distorted monocapped square antiprismatic geometry, and the other is eight-coordinated by one N and five O atoms from three ptc ligands and two aqua ligands in a 4,4'-bicapped trigonal anti-prismatic geometry. The ptc ligands brigde the Sm(III) ions into a three-dimensional polymeric framework. Extensive O-H⋯O hydrogen bonding is observed in the crystal structure.
منابع مشابه
Poly[[pentaaqua(μ4-pyridine-2,4,6-tricarboxylato)(μ3-pyridine-2,4,6-tricarboxylato)diterbium(III)] monohydrate]
The three-dimensional title coordination polymer, {[Tb(2)(C(8)H(2)NO(6))(2)(H(2)O)(5)]·H(2)O}(n), was hydro-thermally synthesized by reacting the corresponding rare-earth salt with pyridine-2,4,6-tricarb-oxy-lic acid (H(3)ptc). There are two independent Tb(III) atoms in the structure, one of which is nine-coordinated, forming a monocapped NO(8) square-anti-prism and the other is eight-coordinat...
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