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Issue 15, 2019
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Synthesis of new Mn19 analogues and their structural, electrochemical and catalytic properties

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Abstract

We report the synthesis and structural characterisation of new Mn19 and Mn18M analogues, [MnIII12MnII74-O)83-OCH3)23-Br)6(HLMe)12(MeOH)6]Br2 (2) and [MnIII12MnII6Sr(μ4-O83-Cl)8(HLMe)12(MeCN)6]Cl2 cluster (3), where H3LMe is 2,6-bis(hydroxymethyl)-p-cresol. The electrochemistry of 2 and 3 has been investigated and their activity as catalysts in the oxidation of benzyl alcohol has been evaluated. Selective oxidation of benzyl alcohol to benzaldehyde by O2 was achieved using 1 mol% of catalyst with conversions of 74% (2) and 60% (3) at 140 °C using TEMPO as a co-catalyst. No partial conversion of benzaldehyde to benzoic acid was observed. The results obtained revealed that different operative parameters – such as catalyst loading, temperature, time, solvent and the presence of molecular oxygen – played an important role in the selective oxidation of benzyl alcohol.

Graphical abstract: Synthesis of new Mn19 analogues and their structural, electrochemical and catalytic properties

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Supplementary files

Article information


Submitted
06 Dec 2018
Accepted
13 Feb 2019
First published
13 Feb 2019

Dalton Trans., 2019,48, 4830-4836
Article type
Paper

Synthesis of new Mn19 analogues and their structural, electrochemical and catalytic properties

E. Chevallot-Beroux, A. M. Ako, W. Schmitt, B. Twamley, J. Moran, B. Corinne, L. Ruhlmann and S. Mameri, Dalton Trans., 2019, 48, 4830
DOI: 10.1039/C8DT04807J

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