Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 963, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2022.122298
Keywords
Aluminum complexes; redox-active ligands; application of redox-active ligands catalysis
Categories
Funding
- SERB, Government of India [SB/FT/CS-095/2013]
- CSIR
- MNIT Jaipur
- CSIR-UGC
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Aluminum has advantages as a catalyst due to its easy availability, inexpensiveness, and non-toxicity, but the development of Al(I) molecular complexes supported by redox-active ligands is important for future applications of new catalysts.
Applications of aluminum as a catalyst for organic/inorganic transformation reactions are ideal because of its easy availability, inexpensiveness, and non-toxicity. However, successful implementation of Al(III) complexes as catalysts require an easy reduction-oxidation cycle between Al(III) and Al(I). Nevertheless, molecular complexes of Al(I) are not common, often require special efforts for their synthesis and isolation. Additionally, the Al(I)-> Al(III) oxidation reaction is facile whereas the corresponding Al(III)-> Al(I) reduction occurs only under highly reducing conditions. This creates a problem in developing Al(I)/Al(III) couple catalytic cycle for practical application. But, for aluminum complexes to be applicable in redox transformations, complexes must readily undergo reversible oxidation and reduction processes. One can envision applying a redox-active ligand where instead of aluminum the ligand would be reversibly oxidized and reduced to perform a certain electron transfer process. So, the development of a large pool of aluminum complexes supported by redox-active ligands is very important. In this review article, we have summarized recent developments on the syntheses of aluminum complexes with some redox-active ligands. This may help in designing new catalysts for future applications. (C) 2022 Elsevier B.V. All rights reserved.
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