СRYSTAL STRUCTURE OF A NOVEL CADMIUM SULFATE COORDINATION POLYMER BASED ON THE MULTIDENTATE 2-(3-(4-(PYRIDIN-4-YL)PHENYL)-1H-1,2,4-TRIAZOL-5-YL) PYRIDINE LIGAND
F.-L. Liu, X.-P. Wang, D. Sun
Shandong University, Jinan P. R. China
dsun@sdu.edu.cn
Ключевые слова: coordination polymer, cadmium complex, sulfate, 2-(3-(4-(pyridin-4-yl)phenyl)-1H-1,2,4-triazol-5-yl)pyridine
Страницы: 978-982
Подраздел: КРАТКИЕ СООБЩЕНИЯ
Аннотация
A novel metal-organic coordination polymer, namely [Cd2(Hpptpd)2(SO4)2(H2O)]n (I) (Hpptpd = 2-(3-(4-(pyridin-4-yl)phenyl)-1H-1,2,4-triazol-5-yl)pyridine), is hydrothermally synthesized and characterized by elemental analysis, IR and X-ray single crystal diffraction. The X-ray diffraction analysis reveals that I crystallizes in the triclinic system, space group P–1 with a = 8.593(6) Å, b = 9.832(6) Å, c = 11.845(7) Å, α = 68.172(10)°, β = 88.002(12)°, γ = 84.916(11)°, V = 925.3(10) Å3, Z = 2. In I, the Cd(II) atom is heptacoordinated and displays a CdN3O4 pentagonal bipyramidal geometry. A pair of head-to-tail arranged Hpptpd ligands with a chelating+bridging mode binds two Cd(II) ions to form a centrosymmetric [Cd2(Hpptpd)2] subunit which is bridged by two centrosymmetric sulfate anions to form a zigzag chain. The interchain Owater—H⋯Osulfate hydrogen bond extend the one-dimensional (1D) chain into a two-dimensional (2D) supramolecular sheet incorporating centrosymmetric twelve-membered R44(12) hydrogen-bonding rings. The adjacent sheets further interdigitate with each other to form the resultant three-dimensional (3D) supramolecular framework by NHpptpd—H⋯Osulfate hydrogen bonds and π⋯π stacking interactions.
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