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Poly[tetraaquadi-mu4-malonato-barium(II)zinc(II)]
1College of Materials and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160, People's Republic of China. guomlin@yahoo.com
Summary
This study describes a novel polymeric barium-zinc malonate complex, [BaZn(C3H2O4)2(H2O)4]n. The structure features alternating layers of metal cations and malonate ligands, stabilized by extensive hydrogen bonding.
Area of Science:
- Coordination Chemistry
- Materials Science
- Crystallography
Background:
- Malonate ligands are versatile building blocks in coordination chemistry.
- Barium and zinc cations exhibit diverse coordination preferences.
- Polymeric coordination compounds offer tunable properties.
Purpose of the Study:
- To synthesize and characterize a novel barium-zinc malonate coordination polymer.
- To elucidate the crystal structure and bonding characteristics of the complex.
- To investigate the supramolecular assembly and hydrogen bonding network.
Main Methods:
- Single-crystal X-ray diffraction analysis.
- Infrared spectroscopy.
- Elemental analysis.
Main Results:
- The title complex, [BaZn(C3H2O4)2(H2O)4]n, forms a 1D coordination polymer.
- Barium ions exhibit square-antiprismatic coordination, while zinc ions display octahedral coordination.
- The structure consists of alternating layers of metal-malonate and metal-aqua units, linked by hydrogen bonds.
Conclusions:
- The malonate dianion acts as a bridging ligand, connecting Ba(II) and Zn(II) centers.
- Extensive hydrogen bonding involving water molecules contributes to the structural stability.
- The layered structure suggests potential for further functionalization or applications in materials science.