Crystal structure of an HgII coordination 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]

Suk-Hee Moon; Donghyun Kang; Ki-Min Park

doi:10.1107/S2056989016015310

Crystal structure of an Hg^II coordination 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]

Acta Crystallogr E Crystallogr Commun. 2016 Oct 4;72(Pt 11):1513-1516. doi: 10.1107/S2056989016015310. eCollection 2016 Nov 1.

Authors

Suk-Hee Moon¹, Donghyun Kang², Ki-Min Park³

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.

Abstract

The asymmetric unit of the title compound, {[HgLCl₂]·0.5CHCl₃} _n (L = N-(pyridin-4-ylmeth-yl)pyridin-3-amine, C₁₁H₁₁N₃), contains one Hg^II ion, one bridging L ligand, two chloride ligands and a chloro-form solvent mol-ecule with half-occupancy that is disordered about a crystallographic twofold rotation axis. Each Hg^II ion is coordinated by two pyridine N atoms from two symmetry-related L ligands and two chloride anions in a highly distorted tetra-hedral geometry with bond angles falling in the range 99.05 (17)-142.96 (7)°. Each L ligand bridges two Hg^II ions, 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 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 chloro-form solvent mol-ecules and the coordinating chloride anions are also observed.

Keywords: HgII compound; crystal structure; unsymmetrical dipyridyl ligand; zigzag coordination polymer.