A number of pivalamidate bridged dinuclear [PtII2(RNH2)4(NHCOtBu)2]2+, [PtIII2LL′ (RNH2)4(NHCOtBu)2]n+ (2RNH2 = 2NH3, 1,2-ethylenediamine, 1,2-diaminocyclohexane; L, L′ = NO3−, H2O, or ketonate), trinuclear [{PtII(dap)(NHCOtBu)2}2PdIII]3+ (dap = 1,2-diaminopropane), tetranuclear [{PtII2(NH3)2(DACH)(NHCOtBu)2}2]4+ (DACH = 1,2-diaminocyclohexane), pentanuclear [{Pt2(C5H7O)(NH3)2Cl2(NHCOtBu)2}2PtCl4], and hexanuclear [Pt2(NH3)2(en)(NHCOtBu)2Pt(NO2)4]2 platinum complexes containing Pt(II)–Pt(II), Pt(II)–Pt(III), Pt(II)–Pd(III), and Pt(III)–Pt(III) interactions have been prepared and structurally characterized. The Pt–Pt interactions are characteristic of covalent, dative, or orbital symmetric Pt–Pt bonds. The dimeric Pt(III) complexes are able to activate C–H bonds of ketones to afford ketonate platinum(III) complexes. The Pt–Pt bonds are either doubly amidate-bridged or ligand unsupported. Their distances are 2.99–3.22 Å for Pt(II)–Pt(II), 2.59–2.72 Å for Pt(III)–Pt(III), 2.98 Å for Pt(II)–Pt(III), and 2.66 Å for Pt(II)–Pd(III) bonds depending on the oxidation states of the two metals and the ancillary ligands.