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Transmission of trans effects in dinuclear complexes
E Sola1, F Torres, M V Jiménez
1Departamento de Quimica Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain.
Journal of the American Chemical Society
|November 29, 2001
Summary
Ligand substitution in iridium complexes reveals how trans effects transmit through metal-metal bonds. This transmission influences reactivity and structure in dinuclear compounds.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Coordination Chemistry
Background:
- Diiridium complexes exhibit unique electronic properties due to metal-metal bonding.
- Ligand lability is a crucial factor in organometallic reaction mechanisms.
Purpose of the Study:
- To investigate the transmission of ligand trans effects in diiridium complexes.
- To understand how structural modifications impact ligand lability and reactivity.
Main Methods:
- Synthesis and structural characterization of diiridium(III) and diiridium(II) complexes.
- Detailed X-ray diffraction studies.
- Extended Hückel molecular orbital calculations.
Main Results:
- Chloride substitution for hydride in diiridium(III) complexes significantly alters ligand lability.
- Structural studies confirm the transmission of trans effects through bridging hydrides.
- Calculations suggest sigma-symmetric molecular orbitals facilitate trans effect transmission along the complex backbone.
Conclusions:
- Ligand trans effects can be transmitted through metal-metal bonds in dinuclear complexes.
- This transmission is vital for understanding the reactivity and structural dynamics of such compounds.
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