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Cationic (η6-Arene)tricarbonylmanganese Linked to Neutral (η6-Arene)tricarbonylchromium Complexes

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posted on 30.08.2004, 00:00 by Stéphanie Schouteeten, Jean-Philippe Tranchier, Françoise Rose-Munch, Eric Rose, Audrey Auffrant, G. Richard Stephenson
Palladium-catalyzed Sonogashira coupling reactions of the neutral [η5(1−5)-1-ethynyl-4-methoxycyclohexa-2,4-dienyl]tricarbonylmanganese(I) (4) and (η6-chlorobenzene)tricarbonylchromium (5) yields the dinuclear 1-[η6- phenylethynyl]tricarbonylchromium−[η5(1−5)-methoxycyclohexa-2,4-dienyl]tricarbonylmanganese complex 6, which upon hydride abstraction affords the corresponding dinuclear diphenylacetylene η6-Mn/η6-Cr complex 7. This study has been extended to the case of dinuclear η6-Mn/η6-Cr linked to different spacers comprising a thiophene, a triple bond, or a combination of them.