AI Article Synopsis
- Two new types of bis-Pd(II) hexaphyrin π-ruthenium complexes were synthesized: a double-decker complex and an oxygen-inserted triple-decker complex.
- The double-decker complex formed through the removal of a ruthenoarene unit from a triple-decker complex, while the oxygen-inserted version was created by reacting a specific bis-Pd(II) hexaphyrin with a ruthenium compound in the presence of oxygen.
- Despite expectations that metal complexation would lower overall aromaticity, the study showed distinct aromatic characteristics in these complexes, highlighting how π-metal coordination can effectively alter aromaticity via resonance contributors.
Article Abstract
Two types of new bis-Pd(II) hexaphyrin π-ruthenium complexes are reported. A double-decker bis-Pd(II) hexaphyrin π-ruthenium complex was obtained by oxidation-induced detachment of a ruthenoarene unit from the triple-decker complex and oxygen-inserted triple-decker bis-Pd(II) hexaphyrin π-ruthenium complex was obtained upon treatment of bis-Pd(II) [26]hexaphyrin with [RuCl(-cymene)] under aerobic conditions. Although π-metal complexation of porphyrinoids often results in decreased global aromaticity due to the enhancement of local 6π aromatic segments, distinct aromatic characters were indicated for and by H-NMR spectral and theoretical calculations. These results are accounted for in terms of possible resonance contributors of hexaphyrin di- and tetraanion ligands. Thus, π-metal coordination has been shown to be effective for modulation of the overall aromaticity.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7357109 | PMC |
| http://dx.doi.org/10.3390/molecules25122753 | DOI Listing |
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