Abstract
In the title polymeric ZnII compound, [Zn(C8H7O3)2(C12H12N2)] n , the Zn cation is coordinated by two N atoms from 1,2-bis-(pyridin-4-yl)ethane unit and four O atoms from two mandelate [or hy-droxy(phen-yl)acetate] anions in a slightly distorted octa-hedral coordination geometry. The 1,2-bis-(pyridin-4-yl)ethane unit bridges two ZnII cations, related by an inversion centre, to form a polymeric chain along [110]. The crystal structure features extensive O-H⋯O and weak C-H ⋯O hydrogen bonds, with C-H ⋯ π inter-actions and π-π inter-actions also being present. The centroid-centroid distance between the phenyl ring of the mandelate group and the 1,2-bis-(pyridine-4-yl)ethane moiety is 4.951 (2) Å. The 1,2-bis-(pyridin-4-yl)ethane ligand is disordered over two positions, with a refined occupancy of 0.578 (14) for the major component.
Highlights
-Hydroxycarboxylic acids play an important role in many biological processes and in coordination chemistry (Miyamoto et al, 1989)
We report the preparation and structural characterization of a new coordination polymer in which the ZnII cations are coordinated to two mandelate anions, behaving as bidentate ligands, and linked together via 1,2-bis(4-pyridyl)ethane molecules. 1,2-Bis(4-pyridyl)ethane is a versatile building block for the purposes of crystal engineering as the pyridyl N atoms can connect to adjacent metals to form a chain (Lee & Kim, 2015)
Each ZnII cation is coordinated by two N atoms from two 1,2-bis(4-pyridin-4yl)ethane molecules in a trans arrangement and four O atoms from two mandelate anions in a slightly distorted octahedral coordination geometry, as shown in Table 1 and Fig. 1
Summary
-Hydroxycarboxylic acids play an important role in many biological processes and in coordination chemistry (Miyamoto et al, 1989). The deprotonated anion of one example, mandelic acid (2-hydroxy-2-phenylacetic acid), can behave as a multifunctional ligand and can act as a bridging ligand in metal complexes by involving the oxygen atoms of the carboxylate and hydroxy groups (Zechel et al, 2019; Smatanovaet al., 2000; Bromant et al, 2005). We report the preparation and structural characterization of a new coordination polymer in which the ZnII cations are coordinated to two mandelate anions, behaving as bidentate ligands, and linked together via 1,2-bis(4-pyridyl)ethane molecules. 1,2-Bis(4-pyridyl)ethane is a versatile building block for the purposes of crystal engineering as the pyridyl N atoms can connect to adjacent metals to form a chain (Lee & Kim, 2015) We report the preparation and structural characterization of a new coordination polymer in which the ZnII cations are coordinated to two mandelate anions, behaving as bidentate ligands, and linked together via 1,2-bis(4-pyridyl)ethane molecules. 1,2-Bis(4-pyridyl)ethane is a versatile building block for the purposes of crystal engineering as the pyridyl N atoms can connect to adjacent metals to form a chain (Lee & Kim, 2015)
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