The organoplatinum(II) complexes [(NN)PtMe2] and [(NN)PtPh2] (NN = ArNC(Me)C(Me)NAr, Ar = 2,6-dichlorophenyl) can act as donor ligands for copper(l) and silver(l) triflates, affording a series of homo- and heteroleptic complexes which were characterized by X-ray diffraction. [(NN)PtMe2] binds to the coinage metals through short, ligand-unsupported d-d(10) contacts that are best described as Pt -> M dative bonds (M = Cu, Ag), in which the d(z)(2) orbital of the square-planar Pt(II) center donates electron density to the Lewis-acidic metal. Spectroscopic studies in solution and DFT calculations corroborate this description. [(NN)PtPh2] binds preferentially by eta(1) or eta(2) Complexation of the ipso carbon atoms of the phenyl groups to the coinage metal, affording homoleptic complexes {[(NN)PtPh2](2)M)(+)[TfO)(-) in the solid state. The 1:1 adducts of formula {[(NN)PtPh2]M(OTf)}(n) (M = Cu, n = 1; M = Ag, n = 2) are observed in solution, and a 1:2 adduct of formula ([(NN)PtPh2]Ag-2(OTf)(2)(C6H6)}(n) was characterized in the solid state, showing that unsupported Pt -> M bonds are also accessible for [(NN)PtPh2]. The thermolyses of the complexes [(NN)PtMe2]MOTf in benzene affords moderate yields of [(NN)PtPh2] through an oxidatively induced double C-H activation process.