Abstract The synthesis of some benzoquinone palladium complexes bearing different spectator ligands was carried out and the hapticity of the coordinated olefin was inferred from the features of their 1 H and 13 C NMR spectra. It was shown that benzoquinone coordinates either η 2 and η 4 and that its coordinative choice is not easily predictable, although the η 2 coordination seems to be predominant in the presence of rigid ancillary ...
