title: Crystal structure ofN,N'-bis-(pyridin-3-ylmeth-yl)cyclo-hexane-1,4-di-ammonium dichloride.
abstract: The title salt, C18H26N42+·2Cl-, was obtained by the protonation ofN,N-bis-(pyridin-4-ylmeth-yl)cyclo-hexane-1,4-di-amine with hydro-chloric acid in ethanol. The asymmetric unit consists of one half of anN,N-bis-(pyridin-3-ylmeth-yl)cyclo-hexane-1,4-di-ammonium dication, with a crystallographic inversion centre located at the centre of the cyclo-hexyl ring, and a chloride anion. The central cyclo-hexyl ring in the dication adopts a chair conformation. The twotrans-(4-pyridine)-CH2-NH2- moieties at the 1- and 4-positions of the central cyclo-hexyl ring occupy equatorial sites. The terminal pyridine ring is tilted by 53.72 (6)° with respect to the mean plane of the central cyclo-hexyl ring (r.m.s. deviation = 0.2413 Å). In the crystal, N+-H⋯Cl-hydrogen bonds between the dications and the chloride anions, and π-π stacking inter-actions between the pyridine rings of the dications afford a two-dimensional sheet extending parallel to theabplane. These sheets are further connected through weak C-H⋯Cl-hydrogen bonds, resulting in the formation of a three-dimensional supra-molecular network.
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: Research institute of Natural Science and Department of Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea.
authors.forename: Hansu
authors.initials: H
authors.lastname: Im
authors.affiliation: Research institute of Natural Science and Department of Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea.
authors.forename: Tae Ho
authors.initials: TH
authors.lastname: Kim
authors.affiliation: Research institute of Natural Science and Department of Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea.
authors.forename: Ki-Min
authors.initials: KM
authors.lastname: Park
keywords: condensation reaction; crystal structure; diprotonated structure; dipyridyl salt; hydrogen bonding