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

Abstract

Palladium-catalyzed Sonogashira coupling reactions of the neutral [η 5 (1−5)-1-ethynyl-4-methoxycyclohexa-2,4-dienyl]tricarbonylmanganese(I) ( 4 ) and (η 6 -chlorobenzene)tricarbonylchromium ( 5 ) yields the dinuclear 1-[η 6 - phenylethynyl]tricarbonylchromium−[η 5 (1−5)-methoxycyclohexa-2,4-dienyl]tricarbonylmanganese complex 6, which upon hydride abstraction affords the corresponding dinuclear diphenylacetylene η 6 -Mn/η 6 -Cr complex 7 . This study has been extended to the case of dinuclear η 6 -Mn/η 6 -Cr linked to different spacers comprising a thiophene, a triple bond, or a combination of them.