Abstract
A 4Fe4S cluster complex with pyridine-2-thiolato ligands, (Et 4N) 2[Fe 4S 4(S-2-(4-NO 2)C 5H 3N) 4], has been synthesized by the ligand exchange reaction. X-ray structure analysis revealed that the Fe atoms in the core are chelated by the ligands in a bidentate form. The four-membered chelate ring has a very small bite angle of NFeS=64.7°. The complex crystallizes in space group Fddd, displaying a highly symmetrical molecular structure. A quasi-reversible redox wave is observed at E 1/2=−1.46 V (vs. SCE), showing a large negative shift relative to those in ordinary arenethio analogues.
Published Version
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