Antisymbiosis. Preferential coordination of anionic oxygen versus neutral sulfur donor atoms of methylsulfanyl- or methylsulfinyl-acetato, 2-benzoato and 2-phenolato to the cis-PtII(PPh3)2 and PtII(dppe) residues

The interaction of an excess of the title ligands L− with the cis-Pt(phos)2 moieties gives compounds a-bcis-[Pt(L-O)2(phos)2] (a, phos = P(Ph)3; b, phos = 1/2 dppe), in which O- is preferred to S-coordination. Such preference, as well as the stability of these Pt-O bonds is discussed in terms of antisymbiosis.