Synthesis, structure, and single-crystal EPR study of [Cp(t-Bu3PN)Ti(mu-Cl)]2

Area of Science:

• Organometallic Chemistry
• Inorganic Chemistry
• Solid-State Chemistry

Background:

• Titanium complexes are crucial in catalysis and materials science.
• Dimeric titanium structures offer unique electronic and magnetic properties.
• Understanding Ti(III)-Ti(III) interactions is key to developing new functional materials.

Purpose of the Study:

• To synthesize and characterize a novel chloro-bridged titanium(III) dimer.
• To investigate the electronic structure and magnetic properties of the dimer using advanced spectroscopic techniques.
• To provide the first single-crystal EPR study of a Ti(III)-Ti(III) dimer.

Main Methods:

• Chemical reduction of CpTi(NPt-Bu3)Cl2 with magnesium powder in benzene.
• X-ray crystallography for solid-state structure determination.
• Single-crystal Electron Paramagnetic Resonance (EPR) spectroscopy.
• Extended Hückel molecular orbital (EHMO) calculations.

Main Results:

• Successful synthesis of the chloro-bridged titanium(III) dimer, [CpTi(NPt-Bu3(mu-Cl)]2 (1).
• X-ray crystallography confirmed a centrosymmetric, chloro-bridged dimeric structure.
• Single-crystal EPR provided spin Hamiltonian parameters, offering insights into the Ti(III)-Ti(III) interaction.
• EHMO calculations correlated with experimental data.

Conclusions:

• The synthesized dimer exhibits a stable chloro-bridged structure.
• The EPR study provides fundamental data on Ti(III)-Ti(III) dimers.
• The findings contribute to understanding metal-metal interactions in titanium complexes.