Add time:09/28/2019 Source:sciencedirect.com
A series of oxovanadium (V) and titanium (IV) complexes stabilized by [ONO]2− type ligands-2-[hydroxy(diaryl)methyl]-8-hydroxyquinolines (2–3) were synthesized in high yields and characterized by elemental analysis, NMR-, IR spectroscopy and mass spectrometry. The molecular structures of the representative complexes 4 and 7 were confirmed by single-crystal X-ray diffraction, and revealed distorted octahedral geometry at Ti and tetragonal pyramid in V complex. Titanium-based catalytic systems were found to be active in the ethylene and 1-hexene polymerization and copolymerization, but only in the presence of a binary co-catalyst Et2AlCl/Bu2Mg. Vanadium-based systems were active in the same reactions in the presence of Et3Al2Cl3 or Et2AlCl mixed with CCl3CO2Et reactivator. The amount of co-monomer incorporated by these systems have reached 23 mol%. When applied in the presence of aliphatic solvents vanadium complexes catalyze 1-hexene oligomerization yielding dimers and trimers. When the same process is carried out in toluene, the solvent got alkylated by monomers and light oligomers (Friedel–Crafts reaction).
We also recommend Trading Suppliers and Manufacturers of VANADIUM(V) OXYTRIPROPOXIDE (cas 1686-23-3). Pls Click Website Link as below: cas 1686-23-3 suppliers
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View