The cooperative catalytic activity of several metal corrole complexes in combination with tetrabutyl-ammonium bromide (TBAB) has been investigated for the reaction of epoxides with CO2 leading to cyclic carbonates. It was found that the use of just 0.05 mol % of a manganese(III)corrole with 2 mol % TBAB exhibits excellent catalytic activity under an atmosphere of CO2 .

The use of manganese(III) acetate allows the direct synthesis of diverse arrays of [4.3.0] bicyclic carbohydrate-based γ-lactone building blocks from glycals. A mechanism to explain the high regio- and stereoselectivity is proposed. The new reaction has the potential to generate libraries for biological screening.

Cyclophane-type macrocyclic compounds from 21 to 56 members having two fused dihydrofuran rings were synthesized by the manganese(III)-mediated oxidation of terminal dienes with bis(3-oxobutanoate)s containing aromatics. The reaction detail, characterization and reaction pathways are described.

5-(4-Aminophenyl)-10,15,20-tris(4-sulfonatophenyl) manganese(III) porphyrin conjugated with dextran was synthesized. Its potential of being used as a tumor-targeting magnetic resonance imaging contrast agent was evaluated in vitro and in vivo. The results demonstrated that the compound has a longitudinal relaxivity (R(1)) higher than Gd-DTPA, low cytotoxicity and binding specificity to tumor ce...

Soluble manganese(III) [Mn(III)] has been thought to disproportionate to soluble Mn(II) and particulate Mn(IV)O2 in natural waters, although it persists as complexes in laboratory solutions. We report that, in the Black Sea, soluble Mn(III) concentrations were as high as 5 micromolar and constituted up to 100% of the total dissolved Mn pool. Depth profiles indicated that soluble Mn(III) was pro...

Adsorption of heavy metals and radionuclides (HMR) onto iron and manganese oxides has long been recognized as an important reaction for the immobilization of these compounds. However, in environments containing elevated concentrations of these HMR the adsorptive capacity of the iron and manganese oxides may well be exceeded, and the HMR can migrate as soluble compounds in aqueous systems. Here ...

The reactions of manganese(III) porphyrin complexes with terminal oxidants, such as m-chloroperbenzoic acid, iodosylarenes, and H(2)O(2), produced high-valent manganese(V)-oxo porphyrins in the presence of base in organic solvents at room temperature. The manganese(V)-oxo porphyrins have been characterized with various spectroscopic techniques, including UV-vis, EPR, 1H and 19F NMR, resonance R...

In the oxido-centered title compound, [Fe(2)Mn(C(2)HCl(2)O(2))(6)O(C(4)H(8)O)(H(2)O)(2)], the central O atom is linked to three metal atoms, which are themselves each linked to four dichloro-acetate anions, and is in a triangular configuration. Two of the metal atoms are each coordinated by a water mol-ecule, whereas the third is coordinated by a tetra-hydro-furan mol-ecule. In the crystal, adj...

The title compound, [Mn(C(3)H(7)NO)(6)][Fe(2)Cl(6)O], was obtained unintentionally as a product of an attempted synthesis of heterometallic complexes with Schiff base ligands using manganese powder and FeCl(3)·6H(2)O as starting materials. In the [Fe(2)OCl(6)](2-) anion, the O atom and the Fe atom occupy positions with site symmetry [Formula: see text] and 3, respectively, resulting in a linear...

In the title complex, [Mn(C(27)H(24)Br(3)N(4)O(3))], the Mn(III) ion is six-coordinated in a distorted octa-hedral environment by three N atoms and three O atoms from the trianion of the hexa-dentate ligand tris-[2-(5-bromo-2-oxidobenzyl-idene-amino)eth-yl]amine. All three N (and O) atoms are cis to each other. The three N and the three O atoms are in a fac conformation among each other.