… of anionic oxygen versus neutral sulfur donor atoms of methylsulfanyl-or methylsulfinyl-acetato, 2-benzoato and 2-phenolato to the cis-Pt II (PPh 3) 2 and Pt II (dppe) …
The interaction of an excess of the title ligands L− with the cis-Pt (phos) 2 moieties gives compounds a–bcis-[Pt (LO) 2 (phos) 2](a, phos= P (Ph) 3; b, phos= 1/2 dppe), in which O-is preferred to S-coordination. Such preference is confirmed by the fact that the same products are obtained by reaction of excess of L− with the previously reported a–d complexes [Pt (LO, S)(phos) 2]+,(c, phos= PPh3, d, phos= 1/2 dppe), for which chelate ring opening occurs ...
[Cornock, Margaret C.; Stephenson, T. Anthony Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999), 1977 , p. 501 - 505]