Abstract
The asymmetric unit of the title heterometallic polymeric coordination compound, {[CuYb2(C7H3NO4)4(H2O)8]·H2O}n, contains one CuII cation located on an inversion center, a YbIII cation, two pyridine-2,5-dicarboxylate (pda) anions, four coordination water molecules a disordered lattice water molecule, which is half-occupied and is located close to an inversion center. The CuII cation is N,O-chelated by two pda anions in the coordination basal plane and further coordinated by two carboxyl O atoms at the apical positions, with an elongated octahedral geometry. The YbIII atom is eight-coordinated in a distorted square-antiprismatic geometry formed by two carboxylate O atoms from two pda anions, and is N,O-chelated by one pda anion and four coordinated water molecules. The pda anions bridge adjacent Yb and Cu cations, forming a three-dimensional polymeric structure. The crystal structure features extensive O—H⋯O hydrogen bonds. π–π stacking is observed between parallel pyridine rings, the centroid–centroid distance being 3.843 (4) Å.
Highlights
The asymmetric unit of the title heterometallic polymeric coordination compound, {[CuYb2(C7H3NO4)4(H2O)8]H2O}n, contains one CuII cation located on an inversion center, a YbIII
The YbIII atom is eightcoordinated in a distorted square-antiprismatic geometry formed by two carboxylate O atoms from two pda anions, and is N,O-chelated by one pda anion and four coordinated water molecules
Symmetry codes: (i) x, y−1, z; (iii) −x, −y+2, −z+2; (v) x+1, y, z; (vii) x+1, y−1, z; (viii) −x+1, −y+1, −z+1; (ix) −x+2, −y+1, −z+1
Summary
The asymmetric unit of the title heterometallic polymeric coordination compound, {[CuYb2(C7H3NO4)4(H2O)8]H2O}n, contains one CuII cation located on an inversion center, a YbIII cation, two pyridine-2,5-dicarboxylate (pda) anions, four coordination water molecules a disordered lattice water molecule, which is half-occupied and is located close to an inversion center. The CuII cation is N,O-chelated by two pda anions in the coordination basal plane and further coordinated by two carboxyl O atoms at the apical positions, with an elongated octahedral geometry. The YbIII atom is eightcoordinated in a distorted square-antiprismatic geometry formed by two carboxylate O atoms from two pda anions, and is N,O-chelated by one pda anion and four coordinated water molecules. The pda anions bridge adjacent Yb and Cu cations, forming a three-dimensional polymeric structure. The crystal structure features extensive O—H O hydrogen bonds.
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