Citation: DENG Jian-Qin, LIANG Hong, LU Xue-Chun, CHENG Xing, CHEN Jian-Xin, ZHANG Zhi-Chun. A Novel Phenoxyimine-based Schiff Base Ligand and Its Mononuclear Nickel(II) Complex: Synthesis, Crystal Structure, Norbornene Polymerization and Catalytic Activity[J]. Chinese Journal of Structural Chemistry, ;2016, 35(4): 559-565. doi: 10.14102/j.cnki.0254-5861.2011-0932 shu

A Novel Phenoxyimine-based Schiff Base Ligand and Its Mononuclear Nickel(II) Complex: Synthesis, Crystal Structure, Norbornene Polymerization and Catalytic Activity

1.
a College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou 350007, China;
2.
b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China

Corresponding author: CHEN Jian-Xin,
Received Date: 10 August 2015
Available Online: 10 November 2015
Fund Project: Supported by the Ministry of Education of China (No. 208066) (No. 208066) the Education Department of Fujian Province (JA07029) (JA07029)

A novel phenoxyimine-based Schiff base ligand and its mononuclear complex[C₅₈H₅₂N₂NiO₂] (L=2-benzhydryl-4-dimethoxy-3,5-dimethyl-salicylaldehyde) has been synthesized and characterized by IR spectrum, elemental analysis, TG, WAXD spectra, ¹H NMR and ¹³H NMR. In addition, the molecular structure has been measured by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P2₁/c with a=14.510(6), b=18.573(7), c=20.961(6) Å, β=123.453(19)°, V=4713(3) Å³, M_r=867.73, Z=4, Dc=1.223 g/cm³, μ=0.456 mm^-1, F(000)=1832, the final R=0.0685 and wR=0.1758 (I > 2σ(I)). The complex was used as homogeneous catalysis of polymerization of norbornene, and the MAO as cocatalyst. The nickel complex exhibited good catalytic activity up to 1.913×10⁷ g of PNB (mol of Ni)^-1 h^-1, and the yields of these reactions depend on the nature of the substituent in the aromatic ring.
- nickel complex,
- crystal structure,
- norbornene polymerization,
- catalyst
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沈阳化工大学材料科学与工程学院沈阳 110142