Germylone-bridged bimetallic Ir and Rh complexes

Area of Science:

• Organometallic Chemistry
• Inorganic Chemistry
• Computational Chemistry

Background:

• Germylones are versatile ligands in coordination chemistry.
• Bimetallic complexes offer unique electronic and structural properties.

Purpose of the Study:

• To synthesize and characterize novel germylone-bridged bimetallic complexes.
• To investigate the electronic interactions between germanium and transition metals (Iridium and Rhodium).
• To explore the formation of extended metal-ligand chains.

Main Methods:

• Reaction of germylone 1 with [M(COD)Cl]2 (M = Ir, Rh).
• Spectroscopic characterization (NMR, IR, Mass Spectrometry).
• X-ray crystallography for structural determination.
• Density Functional Theory (DFT) calculations.

Main Results:

• Synthesis of germylone-bridged bimetallic complexes 2 (M=Ir) and 3 (M=Rh).
• Structural characterization confirmed the bridging nature of the germylone ligand.
• DFT studies revealed strong Ge-metal interactions.
• A novel Rh-Ge-Rh-Ge-Rh chain complex (4) was synthesized.

Conclusions:

• Germylones effectively bridge iridium and rhodium centers in bimetallic complexes.
• Strong electronic interactions exist between germanium and the coordinated metals.
• The synthesis of complex 4 demonstrates the potential for constructing extended metal-ligand architectures.