Issue 1, 2010
From the journal:

Dalton Transactions

Unexpected formation of a novel pyridinium-containing catecholate ligand and its manganese(iii) complex†

Tippu S. Sheriff,*a   Michael Watkinson,a   Majid Motevallia  and  Jocelyne F. Lesinb  

* Corresponding authors

a Queen Mary University of London, The Joseph Priestley Building, School of Biological and Chemical Sciences, Mile End Road, London, UK
E-mail: t.s.sheriff@qmul.ac.uk
Fax: +44 (0)20 7882 7427
Tel: +44 (0)20 7882 8466

b Inorganic Chemistry Research Laboratories, Department of Chemistry, University of Hertfordshire, Hatfield, Hertfordshire, UK

Abstract

Nucleophilic aromatic substitution of tetrachloro-o-benzoquinone by pyridine and reduction of the o-quinone to the catechol by hydroxylamine forms 1,2-dihydroxy-3,5,6-trichlorobenzene-4-pyridinium chloride. This compound reacts with manganese(II) acetate in air to form chlorobis(3,5,6-trichlorobenzene 4-pyridinium catecholate)manganese(III), which represents the first complex of this ligand class to be structurally characterized by X-ray diffraction; this complex is active in the catalytic reduction of dioxygen to hydrogen peroxide under ambient conditions and turnover frequencies (TOFs) >10 000 h−1 can be obtained.

Graphical abstract: Unexpected formation of a novel pyridinium-containing catecholate ligand and its manganese(iii) complex

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Article information

DOI
https://doi.org/10.1039/B915747F
Article type
Communication
Submitted
03 Aug 2009
Accepted
19 Sep 2009
First published
02 Oct 2009

Dalton Trans., 2010,39, 53-55

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Unexpected formation of a novel pyridinium-containing catecholate ligand and its manganese(III) complex

T. S. Sheriff, M. Watkinson, M. Motevalli and J. F. Lesin, Dalton Trans., 2010, 39, 53 DOI: 10.1039/B915747F

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