952610-20-7Relevant academic research and scientific papers
Polymerization of methyl methacrylate catalyzed by nickel complexes with hydroxyindanone-imine ligands
Tang, Guangrong,Jin, Guo-Xin
, p. 3840 - 3846 (2008/03/13)
A series of new hydroxyindanone-imine ligands [PhNCC2H 3(CH3)C6H2(CH3)OH] (HL1) and [ArNCC2H3(CH3)C 6H2(R)OH] (Ar = 2,6-i-Pr2C6H 3, R = Me (HL2), R = H (HL3), and R = Cl (HL4)) were synthesized and characterized. Reactions of hydroxyindanone-imines with Ni(OAc)2·4H2O result in the formation of the trinuclear hexa(indanone-iminato)tri(nickel(ii)) complex Ni3[PhNCC2H3(CH3)C6H 2(CH3)O]6 (1) and the mononuclear bis(indanone-iminato)nickel(ii) complexes Ni[ArNCC2H 3(CH3)C6H2(R)O]2 (Ar = 2,6-i-Pr2C6H3, R = Me (2), R = H (3), and R = Cl (4)). All nickel complexes were characterized by their IR, NMR spectra and elemental analyses. In addition, X-ray structure analyses were performed for complexes 1 and 2. After being activated with methylaluminoxane (MAO), these nickel(ii) complexes can be used as catalysts for the polymerization of methyl methacrylate (MMA) to produce syndiotactic-rich PMMA. Catalytic activities and the degree of syndiotacticity of PMMA have been investigated for various reaction conditions. The Royal Society of Chemistry.
