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Synthesis, structure and catalytic activity of manganese(ii) complexes derived from bis(imidazole)methane-based ligands

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Abstract

New mononuclear manganese(II) complexes [Mn(κ2-L1)(OAc)2] ([Mn]-1), [Mn(κ2-L2)(OAc)2] ([Mn]-2) and [Mn(κ2-L3)(OAc)2] ([Mn]-3) with imidazole based ligands {4,4′-(phenylmethylene)bis(2-ethyl-5-methyl-1H-imidazole)} (L1), {(4,4′-((2-methoxy phenyl)methylene)bis(2-ethyl-5-methyl-1H-imidazole)} (L2) and {4,4′-((2-chlorophenyl) methylene)bis(2-ethyl-5-methyl-1H-imidazole)} (L3) are synthesized and fully characterized by a variety of techniques. Furthermore, the molecular structures of complexes [Mn]-1 and [Mn]-2 are established by single crystal X-ray structure analysis. The synthesized manganese(II) complexes exhibited efficient catalytic oxidative coupling of primary amines in air under solvent-free conditions to the corresponding imines in moderate to good yields.

Graphical abstract: Synthesis, structure and catalytic activity of manganese(ii) complexes derived from bis(imidazole)methane-based ligands

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Supplementary files

Article information


Submitted
01 Oct 2019
Accepted
06 Dec 2019
First published
09 Dec 2019

Dalton Trans., 2020, Advance Article
Article type
Paper

Synthesis, structure and catalytic activity of manganese(II) complexes derived from bis(imidazole)methane-based ligands

H. Deka, A. Kumar, S. Patra, M. K. Awasthi and S. K. Singh, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT03886H

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