Organotin compounds as reagents for the synthesis of lanthanoid complexes by redox transmetallation reactions

Redox transmetallation reactions between trimethyltin compounds, SnMe3L [L = 3,5-diphenylpyrazolate (Ph(2)pz), 2,6-di-tert-butyl-4-methylphenolate (OAr), or C6F5] and lanthanoid metals have yielded [Ln(Ph(2)pz)(2)(DME)(2)] (Ln = Eu, Yb), [Ln(Ph(2)pz)(3)(DME)(2)] (Ln = Y, La, Nd, Eu), [Ln(Ph(2)pz)(3)(THF)(3)] (Ln = Nd, Sm), [Ln(Ph(2)pz)(3)(THF)(2)] (Ln = Y, Yb), [Sm(OAr)(3)(THF)], [Yb(OAr)(2)(THF)(3]), and [Yb(C6F5)(2)(THF)(4)] complexes in yields generally competitive with those from other methods, and hexamethylditin. The crystal structures of [Nd(Ph(2)pz)(3)(DME)(2)]center dot DME, [Eu(Ph(2)pz)(3)(DME)(2)]center dot 2DME, and [Sm(Ph(2)pz)(3)(THF)(3)]center dot 3THF were determined. All have nine-coordination of the lanthanoid atom and three eta(2)-Ph(2)pz ligands, the first two also having an eta(1)- and an eta(2)-DME ligand and the last having three THF ligands. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006).