873804-54-7Relevant academic research and scientific papers
Mono- and di-nuclear nickel(II) complexes bearing 3-aryliminomethyl-2- hydroxybenzaldehydes: Synthesis, structures and vinyl polymerization of norbornene
Guo, Yintian,Ai, Pengfei,Han, Lingqin,Chen, Lin,Li, Bo-Geng,Jie, Suyun
, p. 222 - 229 (2012/11/13)
A series of mono- and di-nuclear nickel(II) complexes bearing 3-aryliminomethyl-2-hydroxybenzaldehyde ligands were synthesized and characterized by FT-IR and elemental analysis along with single-crystal X-ray diffraction. The X-ray diffraction analysis re
Highly active and stereospecific polymerization of 1,3-butadiene catalyzed by dinuclear cobalt(ii) complexes bearing 3-aryliminomethyl-2- hydroxybenzaldehydes
Jie, Suyun,Ai, Pengfei,Li, Bo-Geng
scheme or table, p. 10975 - 10982 (2011/12/13)
A series of cobalt(ii) complexes bearing 3-aryliminomethyl-2- hydroxybenzaldehydes (tridentate [NOO] ligands) was prepared and characterized by FT-IR and elemental analysis along with single-crystal X-ray diffraction. The X-ray diffraction analysis revealed that a dinuclear centrosymmetrical structure formed, in which each cobalt atom is surrounded by two bridged ligands and two acetate groups as a distorted octahedron. These dinuclear cobalt complexes displayed high catalytic activities for the polymerization of 1,3-butdiene on activation with organoaluminum cocatalysts to yield cis-1,4-polybutadiene with high selectivity. Ethylaluminum sesquichloride (EASC) was found to be the most efficient cocatalyst resulting in high conversion of butadiene and cis-1,4 content in the polymers with moderate molecular weight. The high catalytic activity and stereoselectivity could be achieved in a wide range of reaction conditions. All the dinuclear cobalt complexes (C1-C6) yielded predominantly cis-1,4-polybutadienes (> 96%) with negligible amounts of trans-1,4 ( 2.4%) and 1,2-vinyl ( 1.5%) products under the Al/Co molar ratio of 80 at 25 °C. The ligand modification by varying the substituents at the 4-position of phenol and on the imino-N aryl ring showed slight influence on the catalytic activity and microstructure of the resulting polymers.
