title: Different supramolecular coordination polymers of [N,N'-di(pyrazin-2-yl)-pyridine-2,6-diamine]Ni(II) with anions and solvent molecules as a result of hydrogen bonding.
abstract: Ni(II) complexes of N,N'-di(pyrazin-2-yl)pyridine-2,6-diamine (H2dpzpda) with different anions were synthesized and their structures were determined by X-ray diffraction. Hydrogen bonds between the amino groups and anions assembled the mononuclear molecules into different architectures. The perchlorate complex had a 1-D chain structure, whereas switching the anion from perchlorate to nitrate resulted in a corresponding change of the supramolecular structure from 1-D to 3-D. When the nitrate complex packed with the co-crystallized water, a double chain structure was formed through hydrogen bonding. The magnetic studies revealed values of g = 2.14 and D = 3.11 cm(-1) for [Ni(H2dpzpda)2](ClO4)2 (1) and g = 2.18 and D = 2.19 cm(-1) for [Ni(H2dpzpda)2](NO3)2 (2), respectively.
authors.affiliation: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan.
authors.forename: Gene-Hsiang
authors.initials: GH
authors.lastname: Lee
authors.forename: Hsin-Ta
authors.initials: HT
authors.lastname: Wang
mesh_terms: D002621:Chemistry / Q000379:methods*; D003460:Crystallization; D018360:Crystallography, X-Ray; D003959:Diamines / Q000737:chemistry*; D006860:Hydrogen Bonding; D008024:Ligands; D008670:Metals / Q000737:chemistry; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013696:Temperature
chemical_list: D003959:Diamines; D008024:Ligands; D008670:Metals; D011108:Polymers; D011725:Pyridines; D012997:Solvents; D009532:Nickel; C023666:pyridine