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The first structurally characterized nonorganometallic titanium(III) alkoxo-bridged dinuclear complexes
Józef Utko1, Szymon Przybylak, Lucjan B Jerzykiewicz
1Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland.
Inorganic Chemistry
|April 16, 2003
Summary
Titanium-titanium bonds were identified in novel titanium complexes. These findings suggest a unique bonding interaction in titanium chemistry.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Materials Science
Background:
- Titanium alkoxide and chloride complexes are versatile precursors in organometallic synthesis.
- The formation of metal-metal bonds is a key area of investigation in inorganic chemistry.
Purpose of the Study:
- To synthesize and characterize novel titanium complexes.
- To investigate the presence and nature of titanium-titanium bonding.
Main Methods:
- Reaction of [Ti4(OMe)14Cl2] with AlMe3.
- Reaction of TiCl4 and Ti(OEt)4 with Al/AlMe3.
- X-ray crystallography and Electron Localization Function (ELF) analysis.
Main Results:
- Cocrystallite species [Ti2(mu-OMe)2(mu-Cl)Cl3(thf)3].[Ti2(mu-OMe)3Cl3(thf)3] (2.3) and [Ti2(mu-OEt)2(mu-Cl)Cl3-(thf)3] (4) were synthesized.
- Short Ti-Ti distances (2.543(1) Å in 2.3 and 2.599(1) Å in 4) were observed.
- Diamagnetism and ELF analysis supported the presence of a Ti-Ti bond.
Conclusions:
- The synthesized titanium complexes exhibit a direct titanium-titanium bond.
- This discovery expands the understanding of bonding in early transition metal chemistry.