Two new complexes of [Sn{2-[(CH3)(2)NCH2]C6H4}(2)] with [Mo(eta(5)-C5H5)(CO)(3)Cl] and [W(eta(5)- C5H5)(CO)(3)Cl], respectively, were prepared via insertion of stannylene into the Mo - Cl or W - Cl bond forming thus the transition metal - tin bond.