title: Cytotoxic activity of platinum (II) complexes with tri-n-butylphosphine. Crystal structure of the dinuclear hydrazine-bridged complex, cis,cis-[PtCl(PBu3n)2(mu-N2H4)PtCl(PBu3n) 2] (ClO4)2.2CHCl3.
abstract: A series of platinum(II) tri-n-butylphosphine complexes having the formulas cis-[PtCl2L2], NEt4[PtCl3L], [PtCl(en)L]Cl, [Pt(en)L2](ClO4)2, sym-trans-[Pt2Cl4L2], [Pt2Cl2L4](ClO4)2, trans,trans-[PtCl2L(mu-N2H4)PtCl2L] trans,trans-[PtCl2L(mu-en)PtCl2L], and cis,cis-[PtClL2(mu-N2H4)PtClL2](ClO4)2 (L = tri-n-butylphosphine; en = ethylenediamine) have been synthesized and their cytotoxic activity in vitro and in vivo has been studied. The solution behavior of the novel dinuclear diamine-bridged platinum(II) complexes has been investigated by means of UV and 31P NMR spectroscopy. For the ionic hydrazine compound cis,cis-[PtClL2(mu-N2H4)PtClL2](ClO4)2, an x-ray structure determination is reported. Crystal data: space group P2(1)/a, a = 17.803(1), b = 18.888(3), c = 12.506(3) A, beta = 107.97(2) degrees, Z = 2, R = 0.052, RW = 0.058. The platinum coordination is approximately square-planar, with the bond lengths Pt-Cl = 2.358(5), Pt-N = 2.15(1), Pt-P(trans to Cl) = 2.260(5), and Pt-P(trans to N) = 2.262(6) A. All investigated compounds were cytotoxic in vitro against L1210 cells and showed no cross-resistance to cisplatin. On the other hand, no antitumor activity was observed vs L1210 leucemia in DBA2 mice.
authors.affiliation: Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université René Descartes, Paris, France.
authors.forename: J
authors.initials: J
authors.lastname: Kozelka
authors.forename: E
authors.initials: E
authors.lastname: Segal
authors.forename: C
authors.initials: C
authors.lastname: Bois
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000627:therapeutic use*; D003460:Crystallization; D006834:Hydrazines / Q000737:chemistry*; D007939:Leukemia L1210 / Q000188:drug therapy; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol; D008752:Methylene Chloride; D051379:Mice; D008811:Mice, Inbred DBA; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000627:therapeutic use*; D010720:Phosphines / Q000138:chemical synthesis / Q000737:chemistry / Q000627:therapeutic use*; D010984:Platinum / Q000737:chemistry / Q000627:therapeutic use*; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D014407:Tumor Cells, Cultured; D014961:X-Ray Diffraction
chemical_list: D000970:Antineoplastic Agents; D006834:Hydrazines; D009942:Organometallic Compounds; D010720:Phosphines; D012996:Solutions; C029424:hydrazine; D010984:Platinum; D008752:Methylene Chloride; D000432:Methanol