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Amido-bridged double-cube nitrido complexes containing titanium and magnesium/calcium
Avelino Martín1, Miguel Mena, Adrián Pérez-Redondo
1Departamento de Química Inorgánica, Universidad de Alcalá, 28871, Alcalá de Henares, Madrid, Spain.
Dalton Transactions (Cambridge, England : 2003)
|June 16, 2005
Summary
New magnesium and calcium nitrido complexes react with anilines to form arylamido complexes. These complexes undergo further reactions, yielding metal halide adducts and novel bridged structures, showcasing diverse reactivity in organometallic chemistry.
Area of Science:
- Organometallic Chemistry
- Materials Science
- Coordination Chemistry
Background:
- Nitrido complexes featuring transition metals and alkali earth metals are of significant interest.
- The synthesis and structural characterization of polynuclear metal-nitrogen clusters remain a key area of research.
- Understanding the reactivity of these clusters provides insights into catalytic processes and materials development.
Purpose of the Study:
- To synthesize novel arylamido complexes from single cube nitrido complexes of magnesium and calcium.
- To elucidate the structural features of these new complexes using X-ray crystallography.
- To investigate the reactivity of the synthesized complexes with chloroform-d1 and explore further structural transformations.
Main Methods:
- Reaction of single cube nitrido complexes with anilines in toluene.
- X-ray crystal structure determination of the resulting magnesium and calcium arylamido complexes.
- Reaction of the arylamido complexes with chloroform-d1 to form metal halide adducts.
- Structural analysis of a bridged complex formed in n-hexane.
Main Results:
- Synthesis of magnesium and calcium arylamido complexes, [(ArHN)M((mu3-N)(mu3-NH)2Ti3(eta5-C5Me5)3(mu3-N))]n.
- Structural characterization revealed a single-cube structure for the magnesium complex and a dimeric structure for the calcium complex.
- Reaction with chloroform-d1 yielded metal halide adducts [Cl2M((mu3-NH)3Ti3(eta5-C5Me5)3(mu3-N))].
- A novel bridged complex with three bridging ligands was identified in n-hexane.
Conclusions:
- The study successfully synthesized and characterized novel arylamido complexes derived from nitrido precursors.
- The structural diversity, including single-cube and dimeric architectures, highlights the versatility of these metal-nitrogen clusters.
- The observed reactivity demonstrates potential pathways for further functionalization and the construction of complex polynuclear structures.