Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties

Kloskowski M, Pursche D, Hoffmann R-D, Poettgen R, Laege M, Hammerschmidt A, Glaser T, Krebs B (2007)
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE 633(1): 106-112.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The trinuclear manganese(II) complexes [Mn-3(L-1)(2)(mu-OAc)(4)]center dot 2Et(2)O {HL1 = (1-hydroxy-4-nitrobenzyl)((2- pyridyl)methyl) ((1-methylimidazol-2-yl)methyl)amine} (1.2EtOH), [Mn-3(L-2)(2)(mu-OAc)(4)] {HL2 = ((1-methylimidazol-2-yl)methyl)(1-hydroxybenzyl)amine (2) and [Mn-3(L-3)(2)(mu-OAc)6] {L-3 = bis(1-methylimidazol-2-yl)methanonel (3) were synthesized. The compounds were characterized by X-ray crystallography, mass spectrometry, IR, UV-vis spectroscopy, and elemental analysis. The manganese atoms in 1 and 2 are bridged by phenol moieties of the ligands and acetates. In 3 they are only bridged by acetates in a mono- and bi-dentate way. The resulting Mn...Mn distances are 3.233(1) angstrom (1), 3.364(1) angstrom (2) and 3.643(7) angstrom (3). In the present compounds different limiting cases for the phenomenon of the carboxylate shift are realized. Besides symmetric mono- and bi-dentate bridging an unusual intermediate is also observed. 1.2EtOH is the first example of a trinuclear model for the OEC that shows catalase activity. Furthermore it was characterized by temperature dependent magnetic susceptibility measurements and a total spin ground state of S-t = 5/2 was found. The results for 1 reveals antiferromagnetic coupling between the central and the terminal manganese ions, with J = 1.2 cm(-1), g = 2.00 (fixed), chi(TIP) = 150 x 10(-6) cm(3) mol(-1).
Stichworte
mangenese complexes; PSIIOEC model complex; catalase activity; trinuclear complexes
Erscheinungsjahr
2007
Zeitschriftentitel
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
Band
633
Ausgabe
1
Seite(n)
106-112
ISSN
0044-2313
eISSN
1521-3749
Page URI
https://pub.uni-bielefeld.de/record/1596221

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Kloskowski M, Pursche D, Hoffmann R-D, et al. Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE. 2007;633(1):106-112.
Kloskowski, M., Pursche, D., Hoffmann, R. - D., Poettgen, R., Laege, M., Hammerschmidt, A., Glaser, T., et al. (2007). Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 633(1), 106-112. doi:10.1002/zaac.200600262
Kloskowski, M., Pursche, D., Hoffmann, R. - D., Poettgen, R., Laege, M., Hammerschmidt, A., Glaser, T., and Krebs, B. (2007). Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE 633, 106-112.
Kloskowski, M., et al., 2007. Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 633(1), p 106-112.
M. Kloskowski, et al., “Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties”, ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, vol. 633, 2007, pp. 106-112.
Kloskowski, M., Pursche, D., Hoffmann, R.-D., Poettgen, R., Laege, M., Hammerschmidt, A., Glaser, T., Krebs, B.: Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE. 633, 106-112 (2007).
Kloskowski, Michael, Pursche, Daniel, Hoffmann, Rolf-Dieter, Poettgen, Rainer, Laege, Mechtild, Hammerschmidt, Adrienne, Glaser, Thorsten, and Krebs, Bernt. “Novel trinuclear Mn-II/Mn-II/Mn-II complexes - Crystal structures and catalytic properties”. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE 633.1 (2007): 106-112.