New cationic organometallic phosphane ligands and their coordination to gold(I)

• Two novel cationic phosphines bearing a η6-coordinated (η5-Cp)Fe+ moiety synthesized.
• One of these ligands was structurally characterized by X-ray structure analysis.
• A transition metal complex (gold) of such a ligand synthesized.
• Structural characterization of the gold complex by X-ray structure analysis.

Two novel metallated phosphino ligands [(η5-Cp)Fe(η6-C6H5PPh2)](PF6) and [(η5-Cp)Fe(η6-1,2-C6H4(PPh2)2)](PF6) have successfully been synthesized. Therein, the phosphane moieties are directly bound to the cationic (η5-Cp)Fe fragment. By reaction of [(η5-Cp)Fe(η6-C6H5PPh2)](PF6) with (thiophene)AuCl, the heterobimetallic complex [(η5-Cp)Fe(η6-C6H5PPh2(AuCl))][PF6] was obtained in good yields. It was characterized spectroscopically as well as by X-ray structure analysis.

Cationic arylphosphines bearing a η6-coordinated (η5-Cp)Fe+ moiety were synthesized via a nucleophilic aromatic substitution reaction. Such ligands open up the access to bimetallic complexes, and allow studying cooperative effects between the metal sites.Figure optionsDownload as PowerPoint slide