Synthesis and structural characterization of new p-ferrocenylphenylacetylene bridged cobalt carbonyl clusters

A new ferrocenylphenyl butadiynyl compound Fc–C6H4–(CC)2–C6H5 (L) has been synthesized by the Glaser cross-coupling reaction and three new complexes with a 4-ferrocenylphenyl-μ-alkyne-dicobalt moiety, [Fc–C6H4–(CC)n–R][Co2(CO)6]n′ [Fc = C5H5FeC5H4, R = H, n = 1, n′ = 1 (1); R = C6H5, n = 2, n′ = 2 (2); R = Fc-C6H4, n = 2, n′ = 2 (3) ], were obtained in the reaction of p-ferrocenylphenylacetylene compounds with Co2(CO)8. Compounds L, 1, 2 and 3 were characterized by elemental analysis, IR, 1H, 13C NMR and MS. The molecular and crystal structures of compounds L and 2 have been determined by X-ray single crystal analysis. There is a linear C5H4–C6H4–(CC)2–C6H5 linkage in compound L, and the terminal ferrocenylphenyl and phenyl groups in complex 2 are a cis arrangement.

Graphical abstractA new ferrocenylphenyl butadiynyl compound L and three new complexes 1, 2 and 3 have been synthesized. The composition and structure of the four compounds were characterized by elemental analysis, FTIR, NMR and MS. The molecular and crystal structures of L and 2 were analyzed by X-ray single crystal diffraction.Figure optionsDownload full-size imageDownload as PowerPoint slide