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Poly[(μ5-3-carboxybenzene-1,2-dicarboxylato)lead(II)]: a helical lead(II) coordination polymer
Shao-Min Cheng1, Xian-Fei Wang1, Fang Yang1
1College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, People's Republic of China.
Abstract:
In the title polymer, [Pb(C9H4O6)]n, the asymmetric unit contains a monomer of a Pb(II) cation with a doubly deprotonated 3-carboxybenzene-1,2-dicarboxylate dianion (1,2,3-Hbtc(2-)). Each Pb(II) centre is seven-coordinated by seven O atoms of bridging carboxy/carboxylate groups from five 1,2,3-Hbtc(2-) ligands, forming a distorted pentagonal bipyramid. The Pb(II) cations are bridged by 1,2,3-Hbtc(2-) anions, yielding two-dimensional chiral layers. The layers are stacked above each other to generate a three-dimensional supramolecular architecture via a combination of C-H···O interactions. The thermogravimetric and optical properties are also reported.
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