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Open Access Crystal structure of an HgII coordination polymer with an unsymmetrical dipyridyl ligand: catena-poly[[[dichloridomercury(II)]-μ-N-(pyridin-4-ylmethyl)pyridin-3-amine-κ2N:N′] chloroform hemisolvate]

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The asymmetric unit of the title compound, {[HgLCl2]·0.5CHCl3}n (L = N-(pyridin-4-ylmethyl)pyridin-3-amine, C11H11N3), contains one HgII ion, one bridging L ligand, two chloride ligands and a chloroform solvent molecule with half-occupancy that is disordered about a crystallographic twofold rotation axis. Each HgII ion is coordinated by two pyridine N atoms from two symmetry-related L ligands and two chloride anions in a highly distorted tetrahedral geometry with bond angles falling in the range 99.05 (17)–142.96 (7)°. Each L ligand bridges two HgII ions, forming polymeric zigzag chains propagating in [010]. In the crystal, the chains are linked by intermolecular N/C—H...Cl hydrogen bonds together with weak C—H...π interactions, resulting in the formation of a three-dimensional supramolecular network, which is further stabilized by C—Cl...π interactions between the solvent chloroform molecules and the pyridine rings of L [chloride-to-centroid distances = 3.442 (11) and 3.626 (13) Å]. In addition, weak Cl...Cl contacts [3.320 (5) Å] between the chloroform solvent molecules and the coordinating chloride anions are also observed.
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Document Type: Research Article

Affiliations: 1: Department of Food and Nutrition, Kyungnam College of Information and Technology, Busan 47011, Republic of Korea 2: Department of Science Education, Kyungnam University, Changwon 51767, Republic of Korea 3: Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Republic of Korea

Publication date: January 1, 2016

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