252048-80-9

Upstream product

• 37942-07-7 3,5-di-tert-butyl-2-hydroxybenzaldehyde 
• 2688-84-8 2-phenoxyaniline 

Downstream Products

• 252268-92-1 AlMe₂[3,5-Bu(t)2-2-(O)C₆H₂CH=N-2-OPhC₆H₄] 
• 800393-52-6 [(((CH₃)3C)2(O)C₆H₂CH₂NC₆H₄OC₆H₅)Ti(CH₂C₆H₅)2] 
• 649750-03-8 [N-(3,5-di-tert-butylsalicylidene)-2-phenoxylanilinato]Ti(IV)Cl₃ 
• 252268-98-7 (AlMe[3,5-Bu(t)2-2-(O)C₆H₂CH=N-2-OPhC₆H₄])(MeB(C₆F₅)3) 

Relevant academic research and scientific papers

Synthesis and characterization of tridentate [O-N(H)X] titanium complexes and their applications in olefin polymerization

A series of [O-N(H)X]TiCl3 complexes derived from (arylamino)methylene phenol are prepared. The molecular structures of the complexes are characterized by 1H NMR, 13C NMR, and X-ray analysis. Upon activation with modified methylaluminoxane (MMAO), the titanium complexes display high thermal stability and single-site like ethylene (co)polymerization behavior at the temperatures of up to 150 °C. 1-Octene and 1-octadencene prove suitable to be incorporated into polyethylene backbone at 110 °C and the highest activity of 1.89 × 106 g/mol(Ti)·h·atm can be achieved. The pendant group X has great influence on the catalytic behaviors of the complexes, and PPh2 proves to be the optimal group.

Synthesis characterisation of neutral cationic alkyl aluminium complexes bearing N,O-Schiff base chelates with pendant donor arms

The Schiff base ligands [3,5-Bu2t-2-(OH)C6H2CH=NL] [L = CH2CH2NMe2 (1a), 2-(PhO)C6H4 (1b), 2-CH2C5H3N (1c), 8-C9H6N (quinoline) (1d) and 2-(PPh2)C6H4 (1e)] are accessed in good yields (>85%) via standard imine condensation reactions. Reaction of 1a-e with Me3Al at room temperature affords the corresponding complexes [(3,5-Bu2t-2-(O)C6H2CH=NL)AlMe 2] (2a-e); in the case of L = 8-quinoline, the same reaction conducted in refluxing toluene affords binuclear {[3,5-Bu2t-2-(O)C6H2CHMeN-8-C 9H6N]AlMe}2 (3) by methyl migration from metal to ligand. Further reaction of the dimethyl compounds with B(C6F5)3 in CD2Cl2 or C6D6 affords the cationic systems [(3,5-Bu2t-2-(O)C6H2CH=NL)AlMe] + (4a-e). The crystal structures of 2a, 2c, 2e and 3 have been determined. In 2a and 2c the respective ligands bind to the metal centre via all three heteroatoms, the aluminium having a trigonal bipyramidal geometry, whereas in 2e coordination is via nitrogen and oxygen only, and the aluminium is tetrahedral. Complex 3 has a dimeric structure with the ligand adopting both tridentate and binucleating roles; the aluminium centres are trigonal bipyramidal.