论文部分内容阅读
Two novel copper complexes with methyl or trifluoro-substituted mono-β-diiminato ligands and one acetoxyl anion were synthesized and characterized by IR spectroscopy and elemental analysis for the first time. The structure of complex 2 bearing trifluoro substituents was further confirmed by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with a = 7.377(4), b = 11.727(6), c = 12.913(7) ?, α = 116.569(6), β = 98.829(7), γ = 96.520(6)°, V = 966.2(8) ?3, Z = 2, Mr = 479.86, Dc = 1.649 g/cm3, F(000) = 482, μ = 1.205 mm-1, the final R = 0.0370 and w R = 0.0903 for 3430 observed reflections with I > 2σ(I). These mono-β-diiminato copper complexes can effectively catalyze methacrylate(MA) polymerization when activated by MMAO. The introduction of fluoro groups into the N-aryl ring of β-diiminato ligands can greatly increase the catalytic activity of copper complexes as well as the molecular weight of PMA.
Two novel copper complexes with methyl or trifluoro-substituted mono-β-diiminato ligands and one acetoxyl anion were synthesized and characterized by IR spectroscopy and elemental analysis for the first time. The structure of complex 2 bearing trifluoro substituents was further confirmed by single-crystal The crystal belongs to the triclinic system, space group P1 with a = 7.377 (4), b = 11.727 (6), c = 12.913 (7)?,? = 116.569 (6),? = 98.829 Γ = 96.520 (6) °, V = 966.2 (8) 3 3, Z = 2, Mr = 479.86, Dc = 1.649 g / cm3, F (000) = 482, μ = 1.205 mm-1, the These mono-β-diiminato copper complexes can be effectively catalyzed methacrylate (MA) polymerization when activated by MMAO. The introduction of fluoro groups into the N -aryl ring of β-diiminato ligands can greatly increase the catalytic activity of copper complexes as well as the molecular weight of PMA.