Synthesis, molecular structure and reactivity of new π-conjugated diyne with ferrocenyl and phenyl units

New π-conjugated butadiynyl ligand FcC(CH3)2Fc′–CC–CC–Ph (L1) has been synthesized and its reaction with Co2(CO)8 has been studied. New clusters [FcC(CH3)2Fc′–CC–CC–Ph][Co2(CO)6]n [(1): n = 1; (2): n = 2] and [Fc–CC–CC–Ph][Co2(CO)6]n [(3): n =  1; (4): n = 2] were obtained by the reaction of ligands FcC(CH3)2Fc′–CC–CC–Ph (L1) and Fc–CC–CC–Ph (L2) with Co2(CO)8 respectively and the composition and structure of the clusters and ligands have been characterized by elemental analysis, FTIR, 1H and 13C NMR and MS. The crystal structures of compounds L1, L2, 2 and 4 have been determined by X-ray single crystal analysis.

Graphical abstractNew clusters FcC(CH3)2Fc′–CC–CC–Ph[Co2(CO)6]n and Fc–CC–CC–Ph[Co2(CO)6]n (n = 1 or 2) have been synthesized by the reaction of ligands FcC(CH3)2Fc′–CC–CC–Ph and Fc–CC–CC–Ph with Co2(CO)8 respectively and the composition and structure were characterized by elemental analysis, FTIR, NMR and MS. The molecular and crystal structures of four compounds were analyzed by X-ray single crystal diffraction.Figure optionsDownload full-size imageDownload as PowerPoint slide