The 84-electron hexaplatinum cluster complex [Pt-6(mu-CO)(6)(mu-dppm)(3)], 1, dppm = Ph2PCH2PPh2, reacts in a 1:2 molar ratio with either 0-electron metalloligands LM+ (L = Ph3P, M = Cu, Ag, Au; L = iPr(3)P, M = Au) or InX3 (X = Cl, Br) or 2-electron metalloligands Tl+ and Hg to give the corresponding 84-electron clusters [Pt-6(mu(3)-ML)(2)(mu-CO)(6)(mu-dppm)(3)](2+) or [Pt-6(mu(3)-InX3)(2)(mu-CO)(6)(mu-dppm)(3)] or 88-electron clusters [Pt-6[mu(3)-Tl)(2)(mu-CO)(6)(mu-dppm)(3)](2+) and [Pt-6(mu(3)-Hg)(2)(mu-CO)(6)(mu-dppm)(3)], respectively. The mercury cluster is oxidized by CH2I2 to give the known 86-electron cluster [Pt-6(mu(3)-HgI)(2)(mu-CO)(6)(mu-dppm)(3)]. Reaction of 1 with [Ir(CO)(4)](-) occurs in a 1:1 ratio only to give the 98-electron anionic cluster [Pt-6{mu(3)-Ir(CO)(2)}(mu-CO)(6)(mu-dppm)(3)](-), which reacts with [Ph-3- PAu](+) to give [Pt-6{mu(3)-Ir(CO)(2)}(mu(3)-AuPPh3)(mu-CO)(6)(mu-dppm(3)]. The new cluster complexes are characterized by NMR and IR spectroscopies, and [Pt-6(mu(3)-AuPiPr(3))(2)(mu-CO)(6)(mu-dppm)(3)](2+) is also characterized by an X-ray structure determination.