Diphenyl- and Dimesityl-Phosphanyl-Substituted 3,3,4,4,5,5-Hexafluorocyclopentenyl-Gold(I) Dimers – Syntheses and Solid-State Structures

Abstract

1,2-Dichloro-3,3,4,4,5,5-hexafluorocyclopentene (F6cypCl2) was functionalized with diphenyl- and dimesitylphosphanyl groups by a salt-elimination reaction of the respective chlorophosphane (PPh2Cl, PMes2Cl) with in situ generated lithiated F6cyp(Li)Cl. F6cyp(PR2)Cl (R=Ph, Mes) was functionalised again to obtain the corresponding trimethylstannyl substituted compounds F6cyp(PR2)(SnMe3) (R=Ph, Mes). These tin-precursors were used in tin-gold exchange reactions to synthesize the dinuclear gold(I) dimers [F6cyp(PR2)Au]2 (R=Ph, Mes). For the mesityl substituted compound, the phosphanegold chloride adduct F6cyp(PMes2AuCl)(SnMe3), the intermediate of the tin-gold exchange reaction, could also be isolated. All compounds were characterized by multinuclear NMR spectroscopy and X-ray diffraction experiments.