Reaction of the anionic stannyl complexes [Cp(2)MSnPh(3)](-) (M = Mo, W) with HgX(2) (X = Br, I) in THF resulted in the formation of the di- or trinuclear complexes Cp(2)M(SnPh(3))HgX or [Cp(2)M(SnPh(3))]Hg-2 respectively, depending on the molar ratio of the reactants (1:1 or 2:1, respectively). [Cp(2)M(SnPh(3))]Hg-2 was also formed by the reaction of [Cp(2)MSnPh(3)](-) with PhHgBr. Cp(2)W(SnPh(3))HgI crystallizes as unbridged monomers in the orthorhombic space group Pbcn with a = 1646.1(3) pm, b = 1780.1(3) pm, c = 1788.7(3) pm (W-Hg 263.4(1) pm, Hg-I251.1(3) pm, W-Sn 276.8(2) pm; W-Hg-I 177.2(1)degrees, Hg-W-Sn 78.87(6)degrees). Reaction of [Cp(2)M-SnPh(3)](-) with CdCl2 or ZnBr2 only gave the trinuclear complexes [Cp(2)M(SnPh(3))](2)M’ (M’ = Cd, Zn), independent of the employed molar ratio.