title: Crystal structure of di-chlorido-(2,2':6',2''-terpyridine-κ(3) N,N',N'')zinc: a redeter-min-ation.
abstract: The crystal structure of the title compound, [ZnCl2(C15H11N3)], was redetermined based on modern CCD data. In comparison with the previous determination from photographic film data [Corbridge & Cox (1956 ▶). J. Chem. Soc. 159, 594-603; Einstein & Penfold (1966 ▶). Acta Cryst. 20, 924-926], all non-H atoms were refined with anisotropic displacement parameters, leading to a much higher precision in terms of bond lengths and angles [e.g. Zn-Cl = 2.2684 (8) and 2.2883 (11) compared to 2.25 (1) and 2.27 (1) Å]. In the title mol-ecule, the Zn(II) atom is five-coordinated in a distorted square-pyramidal mode by two Cl atoms and by the three N atoms from the 2,2':6',2''-terpyridine ligand. The latter is not planar and shows dihedral angles between the least-squares planes of the central pyridine ring and the terminal rings of 3.18 (8) and 6.36 (9)°. The mol-ecules in the crystal structure pack with π-π inter-actions [centroid-centroid distance = 3.655 (2) Å] between pyridine rings of neighbouring terpyridine moieties. These, together with inter-molecular C-H⋯Cl inter-actions, stablize the three-dimensional structure.
authors.affiliation: Deparment of Chemistry, Anhui University, Hefei 230039, Peoples Republic of China, Key Laboratory of Functional Inorganic Materials, Chemistry, Hefei 230039, People's Republic of China.
authors.forename: Cheng-Cheng
authors.initials: CC
authors.lastname: Kong
authors.affiliation: Deparment of Chemistry, Anhui University, Hefei 230039, Peoples Republic of China, Key Laboratory of Functional Inorganic Materials, Chemistry, Hefei 230039, People's Republic of China.
authors.forename: Jia-Zheng
authors.initials: JZ
authors.lastname: Zhou
authors.affiliation: Deparment of Chemistry, Anhui University, Hefei 230039, Peoples Republic of China, Key Laboratory of Functional Inorganic Materials, Chemistry, Hefei 230039, People's Republic of China.
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Yu
authors.affiliation: Deparment of Chemistry, Anhui University, Hefei 230039, Peoples Republic of China, Key Laboratory of Functional Inorganic Materials, Chemistry, Hefei 230039, People's Republic of China.
authors.forename: Sheng-Li
authors.initials: SL
authors.lastname: Li
keywords: 2,2′:6′,2′′-terpyridine; crystal structure; redetermination; zinc complex; π–π inter­actions