Abstract
The asymmetric unit of the title heterometallic coordination polymer, {[Cu3Yb2(C7H3NO4)6(H2O)12]·2H2O}n, contains one YbIII and two CuII atoms. The CuII atom that is located on an inversion center is N,O-chelated by two pyridine-2,5-dicarboxylate (pdc) anions in a square-planar geometry; the Cu atom located on a general position is N,O-chelated by two pdc anions in the basal plane and is further coordinated by a water O atom at the apical position in a distorted square-pyramidal geometry. The Yb(III) atom is eight coordinated in a distorted square-antiprismatic geometry formed by three carboxylate O atoms from three pdc anions and five water molecules. The pdc anions bridge adjacent Yb(III) and Cu(III) atoms, forming a three-dimensional polymeric structure. The crystal structure contains extensive O—H⋯O hydrogen bonds. π–π stacking is present in the crystal structure, the shortest centroid–centroid distance between parallel pyridine rings of adjacent molecules being 3.646 (3) Å.
Highlights
The CuII atom that is located on an inversion center is N,O-chelated by two pyridine-2,5dicarboxylate anions in a square-planar geometry; the
Cu atom located on a general position is N,O-chelated by two pdc anions in the basal plane and is further coordinated by a water O atom at the apical position in a distorted squarepyramidal geometry
The Yb(III) atom is eight coordinated in a distorted square-antiprismatic geometry formed by three carboxylate O atoms from three pdc anions and five water molecules
Summary
The CuII atom that is located on an inversion center is N,O-chelated by two pyridine-2,5dicarboxylate (pdc) anions in a square-planar geometry; the. Cu atom located on a general position is N,O-chelated by two pdc anions in the basal plane and is further coordinated by a water O atom at the apical position in a distorted squarepyramidal geometry. The Yb(III) atom is eight coordinated in a distorted square-antiprismatic geometry formed by three carboxylate O atoms from three pdc anions and five water molecules. The pdc anions bridge adjacent Yb(III) and. Cu(III) atoms, forming a three-dimensional polymeric structure. The crystal structure contains extensive O—H O hydrogen bonds. – stacking is present in the crystal structure, the shortest centroid–centroid distance between parallel pyridine rings of adjacent molecules being
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