| Abstract
| - Reaction of a Ge(IV) triphenylcorrole complex with nitrate salts gives the corresponding mono- or bis-β-nitro derivatives, depending on the reaction conditions. The reaction shows a high regioselectivity, affording only the 3- or 3,17- isomers, obtained as a mixture of the μ-oxo dimer and the corresponding hydroxide monomer. These species can be easily converted into the corresponding methoxide monomer. The synthesized β-nitro Ge(IV) triphenylcorrolates are characterized by cyclic voltammetry and spectroelectrochemistry, and the site of electron transfer is elucidated.
- The reaction between germanium(IV) meso-triphenylcorrolates and nitrate salts affords the corresponding β-nitro substituted corroles in good yield. Chromatographic separation of the crude reaction mixtures enables isolation of a μ-oxo dimer along with the corresponding monomers bearing a hydroxy or methoxy group at an axial position of the germanium central metal ion. Depending on the reaction conditions, mono- or dinitro substituted complexes can be obtained. The substitution is highly regioselective in each case, giving only the 3-nitro or 3,17-dinitro derivative among the different possible isomers. Five of the synthesized complexes were examined by cyclic voltammetry and UV−visible spectroelectrochemistry in dichloromethane, and the dinitro μ-oxo dimer is structurally characterized.
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