| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1304818 | Inorganic Chemistry Communications | 2008 | 4 Pages |
The pyrazine-containing ligands 1 (pyrazine-2-carboxylic acid (pyridine-2-ylmethyl)-amide) and 2 (pyrazine-2,5-dicarboxylic acid bis-[(pyridine-2-ylmethyl)-amide]) have been synthesized and characterized in order to probe their ability to form polynuclear transition metal complexes. A mixed oxidation state Co3+–Co2+–Co3+ complex with deprotonated ligand 1, [Co(1−)2Co(H2O)2Cl2Co(1−)2]Cl2, has been obtained and characterized by X-ray crystal structure determination. The central octahedral cobalt(II) ion in the complex is coordinated by one pyrazine nitrogen from each of the surrounding octahedral cobalt(III), ions which are meridianally coordinated by two of the ligands 1−. Key aspects of both ligands are their rigid meridianal coordination, coupled with the pyrazine core, which demands coordination of metal ions on opposite sides of the ligand strand.
Graphical abstractA mixed oxidation state Co3+–Co2+–Co3+ complex, [Co(1−)2Co(H2O)2Cl2Co(1−)2]Cl2, demonstrating the potential for molecular weaving has been obtained and characterized by X-ray crystal structure determination.Figure optionsDownload full-size imageDownload as PowerPoint slide
