(η6-Arene)tricarbonylchromium and Ferrocene Complexes Linked to Binaphthyl Derivatives

Palladium-catalyzed coupling reactions of 6,6‘-dihydroxyboron-2,2‘-dimethoxy-1,1‘-binaphthyl 5g and chloroarenetricarbonylchromium complexes 6a−c afforded complexes 7a−c with the binaphthyl residue directly linked to the (η6-arene)tricarbonylchromium entity. Coupling reactions of 2,2‘-dimethoxy, 3,3‘-diodo, and 6,6‘-diodo-1,1‘-binaphthyl 3h and 5h with ethynylarenetricarbonylchromium derivatives 6d−f and ethynylferrocene 9 yielded binaphthyl compounds linked to arenetricarbonylchromium and ferrocenyl derivatives 8a−c, 11a−c, 10, and 12 through a triple bond. Condensation of 2,2‘-dimethylmethoxy, 3-formyl, 1,1‘-binaphthyl 2a with (η6-phenyl)methyltriphenylphosphonium tricarbonylchromium 13 and ferrocenylmethyltriphenylphosphonium 18 gave binaphthyl compounds linked to arenetricarbonylchromium and ferrocenyl derivatives 14 and 19, respectively, through a double bond. X-ray analyses of the dinuclear chromium complex 8a and of the mononuclear chromium complex 17-Z are described.