(Pt-Pt)Tetrakis(mu-(diphosphito(4-)-P,P'))diplatinate(12-) 80011-25-2 Platinate(12-), tetrakis(mu-(diphosphito(4-)-P,P'))di-, (Pt-Pt), octahydrogen Tetrakis(pyrophosphito)diplatinate(II) Tkppdp