Syntheses and Structures of Ni(II) Complexes Containing 2‑alkyliminomethyl Pyrene Ligands

• Main Authors: Luong, Xuan Dien, Nguyen, Xuan Truong, Ngo, Duc Quan, Ken-ichi, Yamashita, Kenichi, Sugiura
• Format: Article
• Language: English
• Published: H. : ĐHQGHN 2019
• Subjects: Coordination chemistry; Nickel, Pyrene; Expanded ligand; Salicylaldimine
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/63629; https://doi.org/10.25073/2588-1140/vnunst.4809
• Institution: Vietnam National University, Hanoi

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 X-ray 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 35.5o between the mean planes of the pyrene rings in the two independent molecules and step distance S = 1.93 Å, whereas the referent nickel(II) bis(salicylaldiminato) takes a much smaller step configuration with an angle of 17.6o and the step distance S = 0.845 Å (chart 1).