Hao, ZQ; Li, F; Gao, W in [Hao, Zhiqiang; Li, Feng; Gao, Wei] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China; [Hao, Zhiqiang] Hebei Normal Univ, Coll Chem & Mat Sci, Hebei Key Lab Organ Funct Mol, Shijiazhuang 050024, Hebei, Peoples R China published o-Trityl phenoxy-imino vanadium (III) complexes: synthesis, characterization, and catalysis on ethylene (co)polymerization in 2020.0, Cited 56.0. Recommanded Product: Diphenylmethanamine. The Name is Diphenylmethanamine. Through research, I have a further understanding and discovery of 91-00-9.
Several phenoxy-imine ligands bearing o-trityl group in phenoxy moiety RN=CHArOH (Ar = C6H2(CPh3)Bu-t, R = 2,6-Me2C6H3 (L1H); 2,6-(Pr2C6H3)-Pr-i (L2H); 3,5-(CF3)(2)C6H3 (L3H); 3,5-(OMe)(2)C6H3 (L4H); CHPh2 (L5H); CPh3 (L6H)) were synthesized and characterized by H-1 NMR and C-13 NMR spectroscopy. The vanadium complexes based on these ligands LVCl2(THF)(2) (1-6) were synthesized via conventional transmetalation reaction in moderate to high yields. Complexes 1-6 were fully characterized by FT-IR, elemental analyses and the molecular structures of 1, 2 center dot H2O, (2 center dot H2O)(2)(mu-Cl)(2), 4, and 5 were confirmed by X-ray crystallographic analysis in which the six-coordinated vanadium centers are in a typical octahedral geometry. Upon activation with Et2AlCl in toluene, complexes 1-6 showed high activities in ethylene polymerization affording polymers with moderate molecular weight (5.9-11.8 x 10(4) Da). Moreover, in hexane or CH2Cl2, 1-6/Et2AlCl exhibited enhanced activities. When activated with MAO or MMAO in toluene, these complexes showed relatively low activities but afforded polymers with ultra-high molecular weight (up to 3.30 x 10(6) Da). 1-6/Et2AlCl also showed high activities in ethylene/1-hexene copolymerization at room temperature giving moderate molecular-weight polymers (6.5-11.4 x 10(4) Da) with co-monomer incorporation being of 6.0 similar to 7.8%.
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Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics