Luminescent [(NH3)(4)Pt][Au(CN)(2)](2).1.5(H2O), which forms from aqueous solutions of [(NH3)(4)Pt]Cl-2 and K[Au(CN)(2)], crystallizes with extended chains of the two ions with multiple close Pt...Au (3.2804(4) and 3.2794(4) Angstrom) and Au...Au (3.2902(5), 3.3312(5), and 3.1902(4) Angstrom) contacts. Nonluminescent [(NH3)(4)Pt][Ag(CN)(2)](2). 1.4(H2O) is isostructural with [(NH3)(4)Pt][Au(CN)(2)](2).1.5(H2O). Treatment of [(NH3)(6)Ni]Cl-2 with K[Au(CN)(2)] forms [(NH3)(2)Ni][Au(CN)(2)](2) in which the [Au(CN)(2)](-) ions function as nitrile ligands toward nickel, which assumes a six-coordinate structure with trans NH3 ligands. The [Au(CN)(2)](-) ions self-associate into linear columns with close Au...Au contacts of 3.0830(5) Angstrom, and pairs of gold ions in these chains make additional but longer (3.4246(5) Angstrom) contacts with other gold ions.