The title platinaundecaborane species, 7,11-(mu-thiobenzoato-S:O)-7,10-bis(
triphenylphosphine-P)-8:9-mu H-7-platina-nido-undecaborane-chloroform (1/1.
5), has a nido-type {PtB10} cage with a five-membered Pt-S-C-O-B ring. Of t
he two PPh3 ligands, one is bound to the Pt atom and the other to a B atom.