Abstract
In the title compound, {[Zn(C4H4O5)(C10H8N2)]·2H2O}n, the ZnII ion displays a distorted tetragonal–pyramidal coordination environment with one hydroxy O and three carboxylate O atoms from three malate anions, and the one remaining position occupied by an N atom from a 4,4′-bipyridine ligand. The pyridine rings of the 4,4′-bipyridine ligand are twisted with respect to each other by a dihedral angle of 35.8 (2)°. The uncoordinated water molecules are linked to the complex molecules by O—H⋯O hydrogen bonds. Each malate anion forms four coordination bonds with three Zn atoms, establishing a layer structure parallel to the ac plane. Adjacent layers are further linked via O—H⋯N hydrogen bonding. π–π stacking between the pyridine rings [face-to-face distance = 3.651 (3) Å] occurs in the crystal structure.
Highlights
State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum (East China), Qingdao Shandong 266555, People’s Republic of China, and bTingyi (Cayman Islands) Holding Corporation, Tianjin 300457, People’s
Atoms from three malate anions, and the one remaining position occupied by an N atom from a 4,40 -bipyridine ligand
The pyridine rings of the 4,40 -bipyridine ligand are twisted with respect to each other by a dihedral angle of 35.8 (2)
Summary
R factor = 0.044; wR factor = 0.087; data-to-parameter ratio = 15.6. ZnII ion displays a distorted tetragonal–pyramidal coordination environment with one hydroxy O and three carboxylate O atoms from three malate anions, and the one remaining position occupied by an N atom from a 4,40 -bipyridine ligand. The pyridine rings of the 4,40 -bipyridine ligand are twisted with respect to each other by a dihedral angle of 35.8 (2). The uncoordinated water molecules are linked to the complex molecules by O—H O hydrogen bonds. Each malate anion forms four coordination bonds with three Zn atoms, establishing a layer structure parallel to the ac plane. Adjacent layers are further linked via O—H N hydrogen bonding. –. 3.651 (3) Å] occurs in the crystal structure
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