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An isolable, nonreducible high-valent manganese(V) imido corrolazine complex
David E Lansky1, Joseph R Kosack, Amy A Narducci Sarjeant
1Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA.
Inorganic Chemistry
|October 13, 2006
Summary
A novel manganese(V) imido complex was synthesized and characterized. This high-valent manganese species exhibits unusual inertness towards reduction but is readily oxidized, forming a pi-radical-cation complex.
Area of Science:
- Inorganic Chemistry
- Organometallic Chemistry
- Coordination Chemistry
Background:
- High-valent manganese imido complexes are of interest due to their unique electronic structures and reactivity.
- Understanding the stability and reactivity of such species is crucial for developing new catalytic applications.
Purpose of the Study:
- To synthesize and characterize a novel manganese(V) imido complex.
- To investigate the reductive and oxidative stability of this high-valent manganese species.
Main Methods:
- Synthesis of the manganese(V) imido complex from a manganese(III) precursor and mesityl azide.
- X-ray crystallography to determine the molecular structure and bonding.
- Electrochemical studies to probe redox properties and reactivity.
Main Results:
- The manganese(V) imido complex [(TBP8Cz)Mn(V)(NMes)] was successfully synthesized.
- X-ray structure confirmed a short Mn-N bond, indicative of a triple bond.
- The complex demonstrated remarkable inertness to one- and two-electron reduction.
- Oxidation was facile, yielding a pi-radical-cation complex.
Conclusions:
- The synthesized manganese(V) imido complex possesses a stable triple bond.
- Its inertness to reduction contrasts with typical high-valent imido complexes.
- The complex serves as a precursor to novel radical-cation species.
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