Syntheses and Properties of Pentafluoroethylplumbanes in the Oxidation States +II, +III, and +IV.

Mono-, bis-, and tris(pentafluoroethyl)plumbanes of the type Pb(C2F5)nAr4- n (Ar = Ph, Tol, Ani; n = 1-3) are easily accessible by treatment of the corresponding arylchloroplumbanes with LiC2F5. The subsequent treatment with HCl furnishes chloro(pentafluoroethyl)plumbanes. The synthesis of the tris(pentafluoroethyl)plumbate(II) anion is facilitated by treatment of Pb(C2F5)3Cl with PPh3. In addition, formation of Pb(C2F5)4 is achieved starting from Pb(OAc)4 and is fully characterized by multinuclear NMR spectroscopy and by single crystal x-ray diffraction of the 1,10-phenanthroline adduct.