[Pt2Cl2(C14H30N2S4)]2+.2PF-6, M(r) = 1105.5, triclinic, P1BAR, a = 6.7536 (15), b = 9.5719 (15), c = 11.9510 (28) angstrom, alpha = 105.736 (12), beta = 91.722 (12), gamma = 101.516 (10)degrees, V = 725.7 angstrom 3, Z = 1, D(x) = 2.529 Mg m-3, lambdaBAR(Mo K-alpha) = 0.71073 angstrom, mu = 10.39 mm-1, F(000) = 520, T = 298 K, R = 0.0372 for 1752 unique observed reflections. The 18-membered ring macrocycle acts as a binucleating agent, coordinating each Pt(II) centre via one aza and two thia donors [Pt-S = 2.288 (3), 2.296 (3); Pt-N = 2.048 (9) angstrom] with the two SCH2CH2NCH2CH2S moieties bound meridionally to the Pt(II) centres. Square planar geometry is completed by a terminal chloro ligand [Pt-Cl = 2.296 (3) angstrom]. The dimeric cation lies across a crystallographic inversion centre, with an intramolecular Pt...Pt separation of 4.2807 (6) angstrom.