Journal
CHEMICAL SOCIETY REVIEWS
Volume 51, Issue 11, Pages 4386-4464Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cs00093h
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Funding
- IISER Kolkata
- CSIR [02(0405)/21/EMR-II]
- CSIR
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The emerging field of organometallic catalysis has shifted towards research on Earth-abundant transition metals. Manganese has emerged as one of the leading competitors, playing an important role in hydrogenation, dehydrogenation, and hydroelementation reactions. Catalyst design is based on metal-ligand bifunctionality, ligand hemilability, and redox activity, resulting in different turnover numbers for product molecules.
The emerging field of organometallic catalysis has shifted towards research on Earth-abundant transition metals due to their ready availability, economic advantage, and novel properties. In this case, manganese, the third most abundant transition-metal in the Earth's crust, has emerged as one of the leading competitors. Accordingly, a large number of molecularly-defined Mn-complexes has been synthesized and employed for hydrogenation, dehydrogenation, and hydroelementation reactions. In this regard, catalyst design is based on three pillars, namely, metal-ligand bifunctionality, ligand hemilability, and redox activity. Indeed, the developed catalysts not only differ in the number of chelating atoms they possess but also their working principles, thereby leading to different turnover numbers for product molecules. Hence, the critical assessment of molecularly defined manganese catalysts in terms of chelating atoms, reaction conditions, mechanistic pathway, and product turnover number is significant. Herein, we analyze manganese complexes for their catalytic activity, versatility to allow multiple transformations and their routes to convert substrates to target molecules. This article will also be helpful to get significant insight into ligand design, thereby aiding catalysis design.
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