title: Crystal structure of an HgIIcoordination polymer with an unsymmetrical dipyridyl ligand:catena-poly[[[di-chlorido-mercury(II)]-μ-N-(pyridin-4-ylmeth-yl)pyridin-3-amine-κ2N:N'] chloro-form hemisolvate].
abstract: The asymmetric unit of the title compound, {[HgLCl2]·0.5CHCl3}n(L=N-(pyridin-4-ylmeth-yl)pyridin-3-amine, C11H11N3), contains one HgIIion, one bridgingLligand, two chloride ligands and a chloro-form solvent mol-ecule with half-occupancy that is disordered about a crystallographic twofold rotation axis. Each HgIIion is coordinated by two pyridine N atoms from two symmetry-relatedLligands and two chloride anions in a highly distorted tetra-hedral geometry with bond angles falling in the range 99.05 (17)-142.96 (7)°. EachLligand bridges two HgIIions, forming polymeric zigzag chains propagating in [010]. In the crystal, the chains are linked by inter-molecular N/C-H⋯Cl hydrogen bonds together with weak C-H⋯π inter-actions, resulting in the formation of a three-dimensional supra-molecular network, which is further stabilized by C-Cl⋯π inter-actions between the solvent chloro-form mol-ecules and the pyridine rings ofL[chloride-to-centroid distances = 3.442 (11) and 3.626 (13) Å]. In addition, weak Cl⋯Cl contacts [3.320 (5) Å] between the chloro-form solvent mol-ecules and the coordinating chloride anions are also observed.
authors.affiliation: Department of Food and Nutrition, Kyungnam College of Information and Technology, Busan 47011, Republic of Korea.
authors.forename: Suk-Hee
authors.initials: SH
authors.lastname: Moon
authors.affiliation: Department of Science Education, Kyungnam University, Changwon 51767, Republic of Korea.
authors.forename: Donghyun
authors.initials: D
authors.lastname: Kang
authors.affiliation: Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Republic of Korea.
authors.forename: Ki-Min
authors.initials: KM
authors.lastname: Park
keywords: HgII compound; crystal structure; unsymmetrical dipyridyl ligand; zigzag coordination polymer