Electron transfer reactions of bis[dicarbonyl(pentamethylcyclopentadienyl)iron] with 2,3-dichloro-5,6-dicyanobenzoquinone

Add time:08/03/2019    Source:sciencedirect.com

The thermal and photochemical reactions of [(C5Me5)Fe(CO)2]2 with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) yield the binuclear complex {[(C5Me5)Fe(CO)2]2·(DDQ)2}. EPR studies using nitroso spin traps support the conclusion that the primary products are [(C5Me5Fe(CO)2]+ radicals. The metal-centered radical transfers an electron to DDQ acceptor to yield {[(C5Me5)Fe(CO)2]2·(DDQ)2} as the only Fe-containing product. Spectroscopic evidence for dimerization of DDQ− to form diamagnetic [DDQ]2−2 in the solid is discussed.

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