In the title compound, [Mn(C(16)H(12)Br(2)N(2)O(2))(N(3))], the Mn(III) ion is chelated by a tetra-dentate Schiff base ligand and coordinated by the N atom of an azide ligand in a distorted square-pyramidal arrangement. It forms phenolate-bridged out-of-plane dimers with Mn⋯O(phenolate) distances of 2.667 (2) Å between pairs of inversion-related mol-ecules. In the crystal, there are offset inte...

Dimanganese(III) complexes of salen-type ligands anchored by 9,9-dimethylxanthene-4,5-diyl spacers were synthesized. Two types of structures, cyclic and acyclic forms, are presented. The 2 + 2 Schiff-base condensation of 5,5'-(9,9-dimethylxanthene-4,5-diyl)bis(salicylaldehyde) and 1,2-diaminobenzene gave a macrocyclic ligand, from which a cyclic dimanganese(III) complex was synthesized. A simil...

The asymmetric unit of the title Schiff base complex, [Mn(C(36)H(46)N(2)O(2))Cl], comprises two crystallographically independent mol-ecules. The Mn(III) centre in each mol-ecule adopts a distorted square-pyramidal geometry. Each Mn(III) ion is coordinated by the N(2)O(2) atoms of the tetra-dentate Schiff base ligand forming the basal plane and the coordinated chloride anion occupies the apical ...

The title compound, [Mn(C(3)H(7)NO)(6)][Cr(NCS)(5)(C(3)H(7)NO)], was obtained unintentionally as a product of an attempted synthesis of heterometallic complexes based on Reineckes anion using manganese powder, Reineckes salt and 1-(2-hy-droxy-eth-yl)tetra-zole as starting materials. The crystal structure of the complex consists of an [Mn(dmf)(6)](2+) cation and a [Cr(NCS)(5)(dmf)](2-) anion (dm...

The five manganese-containing, Keggin-based tungstosilicates [Mn(II)3(OH)3(H2O)3(A-α-SiW9O34)](7-) (1), [Mn(III)3(OH)3(H2O)3(A-α-SiW9O34)](4-) (2), [Mn(III)3(OH)3(H2O)3(A-β-SiW9O34)](4-) (3), [Mn(III)3Mn(IV)O3(CH3COO)3(A-α-SiW9O34)](6-) (4), and [Mn(III)3Mn(IV)O3(CH3COO)3(A-β-SiW9O34)](6-) (5) were synthesized in aqueous medium by interaction of [A-α-SiW9O34](10-) or [A-β-SiW9O34H](9-) with eit...

In this manuscript, we report that a bacterial multicopper oxidase (MCO266) catalyzes Mn(II) oxidation on the cell surface, resulting in the surface deposition of Mn(III) and Mn(IV) oxides and the gradual formation of bulky oxide aggregates. These aggregates serve as nucleation centers for the formation of Mn oxide micronodules and Mn-rich sediments. A soil-borne Escherichia coli with high Mn(I...

This article is a part of our efforts to control the magnetic anisotropy in cyanide-based exchange-coupled systems with the eventual goal to obtain single-molecule magnets with higher blocking temperatures. We give the theoretical interpretation of the magnetic properties of the new pentanuclear complex {[Ni(II)(tmphen)(2)](3)[Os(III)(CN)(6)](2)} x 6 CH(3)CN (Ni(II)(3)Os(III)(2) cluster). Becau...

In the title complex, [Mn(C(5)H(7)O(2))(2)(NCS)(CH(4)O)], the Mn(III) atom has a slightly distorted octa-hedral coordination formed by five O atoms and one N atom. The equatorial positions are occupied by four O atoms of two acetyl-acetonate ligands, while the axial positions are occupied by the N atom of the thio-cyanate anion and the O atom of the methanol mol-ecule. In the crystal structure,...

A central question in biological water splitting concerns the oxidation states of the manganese ions that comprise the oxygen-evolving complex of photosystem II. Understanding the nature and order of oxidation events that occur during the catalytic cycle of five Si states (i 1⁄4 0–4) is of fundamental importance both for the natural system and for artificial water oxidation catalysts. Despite t...

We have presented a detailed theoretical (density functional theory and ONIOM) study on the structure and M-PrP (prion protein) interaction on various prion models, M(PrP) systems (where PrP = HGG, HGGGW x 3H(2)O, and PrP(61-84), and M = Zn, Cu, Ni, Co, Fe, Mn). It was shown that the geometry of the complex [Mn(HGGGW)(H(2)O)] x 2H(2)O is quite different for M = Mn(III) and Mn(II), and partial u...