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The new bifunctional ligand PhNHC(S)NHCH 2 CH 2 PPh 2 (Ptu), containing the thiourea and the phosphine functions, and its Pd(II) and Rh(I) complexes were prepared. Ptu behaves as a bidentate ligand forming seven-membered chelation rings in a boat-like conformation. In the case of palladium, this was ascertained by the X-ray determination of the structure of the complexes [Pd(Ptu)...