TAILIEUCHUNG - Syntheses and structures of Ni(II) complexes containing 2‑alkyliminomethyl pyrene ligands
The N,O-bidentate ligand 2-((methylimino)methyl)pyren-1-ol (1) gives with nickel acetate in a mixed solvent of toluene and ethanol in the presence of NaOAc the nickel(II) complex 1(Ni). It was characterized by elemental analysis, IR, NMR, MS spectroscopy and single crystal Xray diffraction. With respect to the nickel atom the complex 1(Ni) adopts a distorted square planar trans-coordination geometry. | VNU Journal of Science: Natural Sciences and Technology, Vol. 34, No. 4 (2018) 16-20 Syntheses and Structures of Ni(II) Complexes Containing 2‑alkyliminomethyl Pyrene Ligands Luong Xuan Dien1,3,*,Nguyen Xuan Truong1, Ngo Duc Quan2, Ken-ichi Yamashita3, Kenichi Sugiura3 1 School of Chemical Engineering, Hanoi University of Science and Technology, Dai Co Viet, Hanoi, Vietnam 2 School of Engineering Physics, Hanoi University of Science and Technology, Dai Co Viet, Hanoi, Vietnam 3 Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachi-Ohji, Tokyo 192-0397, Japan Received 10 October 2018 Revised 04 December 2018; Accepted 07 December 2018 Abstract: The N,O-bidentate ligand 2-((methylimino)methyl)pyren-1-ol (1) gives with nickel acetate in a mixed solvent of toluene and ethanol in the presence of NaOAc the nickel(II) complex 1(Ni). It was characterized by elemental analysis, IR, NMR, MS spectroscopy and single crystal Xray diffraction. With respect to the nickel atom the complex 1(Ni) adopts a distorted square planar trans-coordination geometry. Concerning the ligand arrangement, complex 1(Ni) has a step configuration with the angle of between the mean planes of the pyrene rings in the two independent molecules and step distance S = Å, whereas the referent nickel(II) bis(salicylaldiminato) takes a much smaller step configuration with an angle of o and the step distance S = Å (chart 1). Keywords: Coordination chemistry, Nickel, Pyrene, -Expanded ligand, Salicylaldimine 1. Introduction can be systematically tunable by introducing various substituents on the aromatic ring [1-15]. Among them, nickel complexes bearing the salicylaldimine ligands were investigated as catalysts for polymerization of ethylene, methyl acrylate, acrylonitrile, and norbornene [2, 6-8, Much attention has been paid to transitionmetal-catalyzed polymerization catalysts bearing .
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