Synthesis, characterization and reactivity of palladium(II) compounds containing terdentate [Csp2, N, S]− or [Csp3, N, S]− ligands

The study of the reactivity of RCHN(C6H4-2-SMe) with R=C6H5 or 2,4,6-Me3-C6H2 with palladium(II) salts is reported. These studies have allowed us to prepare and characterize the coordination complexes: cis-[Pd{RCHN(C6H4-2-SMe)}Cl2] {R=C6H5 or 2,4,6-Me3-C6H2} and the cyclopalladated compounds [Pd{C6H4CHN(C6H4-2-SMe)}Cl] and [Pd{(2-CH2-4,6-Me2-C6H2)CHN(C6H4-2-SMe)}Cl]. The X-ray crystal structures of the latter complexes reveal that the thioimines act as a [Csp2, phenyl,N,S]− and as a [Csp3, N,S]− terdentate group, respectively. The study of the reactions of the cyclopalladated compounds with PPh3 is also reported.