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New anilinotropone-based titanium complexes: synthesis, characterization and application as catalysts for olefin
Mina Mazzeo1, Marina Lamberti, Angela Tuzi
1Dipartimento di Chimica, Università di Salerno, via S. Allende, I-84081, Baronissi, Salerno, Italy. mmazzeo@unisa.it
Dalton Transactions (Cambridge, England : 2003)
|August 30, 2005
Summary
New titanium complexes with anilinotropone ligands were synthesized and show promise for catalyzing ethylene and propene polymerization. These novel compounds offer potential advancements in olefin polymerization catalysis.
Area of Science:
- Organometallic Chemistry
- Polymer Science
Background:
- Titanium complexes are widely studied for olefin polymerization.
- Anilinotropone ligands offer unique electronic and steric properties.
Purpose of the Study:
- Synthesize and characterize novel titanium(IV) dichloride complexes with anilinotropone ligands.
- Evaluate the catalytic activity of these complexes in ethylene and propene polymerization.
Main Methods:
- Synthesis of titanium(IV) dichloride complexes using TiCl4(THF)2 and sodium anilinotropone salts.
- Structural characterization using single-crystal X-ray diffraction.
- Catalytic testing for ethylene and propene polymerization activated by methylaluminoxane.
Main Results:
- Four new titanium complexes (1-4) were successfully synthesized and characterized.
- Complexes 1 and 2 exhibit octahedral geometry with distinct ligand arrangements.
- Complex 3 shows a square-pyramidal structure, and complex 4 is a bimetallic species.
- All synthesized complexes demonstrated activity in ethylene and propene polymerization when activated.
Conclusions:
- The novel titanium-anilinotropone complexes are effective catalysts for olefin polymerization.
- Structural variations influence the coordination geometry and potentially catalytic performance.
- These findings contribute to the development of new catalytic systems for polymer production.