Jump to main content
Jump to site search

Issue 45, 2010
Previous Article Next Article

Synthesis and characterisation of low valent Mn-complexes as models for Mn-catalases

Author affiliations

Abstract

In this work we report the synthesis of two novel manganese complexes, [L13MnII6](ClO4)6 (1·(ClO4)6) and [L2MnII2(μ-OAc)(μ-Cl)](ClO4)2 (2·(ClO4)2), where L12− is the 2,2′-(1,3-phenylenebis(methylene))bis((2-(bis(pyridin-2-ylmethyl)amino)ethyl)azanediyl)diacetic acid anion and L2 is N1,N1′-(1,3-phenylenebis(methylene))bis(N2,N2′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine). The ligands Na2L1 and L2 are built on the same backbone, L2 only contains nitrogen donors, while two carboxylate arms have been introduced in Na2L1. The two complexes have been characterized by single-crystal X-ray diffraction, magnetic susceptibility, EPR spectroscopy, and electrochemistry. X-Ray crystallography revealed that 1 is a manganese(II) hexamer and 2 is a manganese(II) dimer featuring an unprecedented mono-μ-acetato, mono-μ-chlorido bridging motif. The ability of the complexes to catalyse H2O2 disproportionation, thereby acting as models for manganese catalases, has been investigated and compared to the activity of two other related manganese complexes. The introduction of carboxylate donors in the ligands, leading to increased denticity, resulted in a drop in H2O2 disproportionation activity.

Graphical abstract: Synthesis and characterisation of low valent Mn-complexes as models for Mn-catalases

Back to tab navigation

Supplementary files

Publication details

The article was received on 18 Mar 2010, accepted on 12 Aug 2010 and first published on 18 Oct 2010


Article type: Paper
DOI: 10.1039/C0DT00165A
Dalton Trans., 2010,39, 11035-11044

  •   Request permissions

    Synthesis and characterisation of low valent Mn-complexes as models for Mn-catalases

    G. Berggren, P. Huang, L. Eriksson, S. Styring, M. F. Anderlund and A. Thapper, Dalton Trans., 2010, 39, 11035
    DOI: 10.1039/C0DT00165A

Search articles by author

Spotlight

Advertisements