trans-(trimethylphosphine)2PtEtCl | 198901-76-7

• 英文名称: trans-(trimethylphosphine)2PtEtCl
• CAS: 198901-76-7
• 化学式: C₈H₂₃ClP₂Pt
• 分子量: 411.751
• InChiKey: CREDXHDWNALESP-UHFFFAOYSA-M

反应信息

• 作为产物：
  描述：

  [PtCl(Et)(1,5-COD)] 、 三甲基膦 以 二氯甲烷 为溶剂， 以89%的产率得到trans-(trimethylphosphine)2PtEtCl
  参考文献：
  名称：

  Ligand effects on the rates of protonolysis and isotopic exchange for platinum(II) alkyls

  摘要：

  The protonolysis/deuterolysis of complexes L2PtRX (L = phosphorus ligand, R = alkyl group, X = anionic ligand) has been investigated as a mechanistic probe of the reverse reaction, activation of alkanes by Pt(II). Trans-(Et3P)(2)PtMeX (X- = triflate (OTf-), F-, NO3-) solvolyze in acidic CD3OD, forming [trans-(Et3P)(2)PtMe(CD3OD)](+) which reacts slowly with DOTf at room temperature liberating CH3D. In dichloromethane, trans-(Et3P)(2)PtMe(OTf) reacts with HOTf at low temperatures (-70 to -20 degrees C) to give (Et3P)(2)PtMe(H) (OTf)(2) in rapid equilibrium with the reagents, while at higher temperatures rapid methane loss is preceded by extensive deuterium incorporation (with DOTf) into the Pt(II) methyl group. Upon treatment with acid in CD3OD, trans-(Et3P)(2)PtMeX (X = Cl, Br) also undergo H/D exchange before elimination of methane, while trans-(Et3P)(2)PtMeI, (depe)Pt(CH3)(2) (depe=1,2-bis(diethylphosphine)ethane) and cis- [(MeO)(3)P] PtMeCl do not. The alpha hydrogens of trans-(Et3P)(2)PtRCl (R = Me, Et, Bz) exchange with deuterium in CD3OD/DOTf with rates following the order Bz < Me < Et, while no exchange is observed in the protonolysis of trans-(Et3P)(2)Pt(CH2CMe3)Cl which yields (CH3)(3)CCH2D. These trends are interpreted in terms of effects on relative stabilities of key intermediates, Pt(IV) alkyl hydrides and Pt(II) alkane sigma complexes. (C) 1997 Elsevier Science S.A.

  DOI：

  10.1016/s0020-1693(97)05675-2