Anionic complexes with the molecular formula [NBu(4)][Pt(C6F5)(3)L] (L = 8-hydroxyquinoline, C9H7NO, (1); 8-hydroxyquinaldine, C10H10NO, (2); 7,8-benzo[h]quinoline, C13H9N, (3); 8-methylquinoline, C10H9N (4)) were prepared by cleavage of the pentafluorophenyl bridging system in [NBu(4)](2)[Pt-2(mu-C6F5)(2)(C6F5)(4)] with L (1-4) or by substitution of the chloride ion by the ligand L in [NBu(4)](2)[Pt(C6F5)(3)L] (1 and 4). H-1 NMR spectra of 1-3 show the presence of a Pt ... H interaction in solution with J(Pt,H) of 69 (1), 88 (2), and 22 Hz (3). For 4, no Pt-H coupling is observed. Structures of complexes 2 and 4 were determined by single crystal X-ray diffraction. For 2 a Pt-H distance of 2.19 Angstrom was determined, whereas for 4 the methyl hydrogen atoms were not located and a Pt-H distance in the range of 2.3-2.6 Angstrom was calculated geometrically. Compound 2 (C44H45F15N2OPt) crystallizes in the monoclinic system, space group P2(1)/c : a = 18.376(6) Angstrom, b = 11.786(4) Angstrom, c = 20.473(7) Angstrom, beta = 102.88(6)degrees, V = 4322(3) Angstrom(3), Z = 4. Compound 4 (C44H45F15N2Pt) crystallizes in the triclinic system, space group P (1) over bar a = 12.125(2) Angstrom, b = 13.152(2) Angstrom, c = 14.795(7) Angstrom, alpha = 88.20(3)degrees, beta = 68.15(3)degrees, gamma = 86.37(1)degrees, V = 2185.2(5) Angstrom(3), Z = 2. The existence and nature of the Pt ... H interactions both in solution and in the solid state are discussed.