cis-[Pt(2,4,6-Me3C6H2)(Me)(PEt3)2] | 111410-22-1

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: cis-[Pt(2,4,6-Me3C6H2)(Me)(PEt3)2]
• 英文别名: cis-Pt(P(Et)3)2(CH3)(C6H2(CH3)3)；cis-[Pt(methyl)(mesityl)(PEt3)2]
• CAS: 111410-22-1
• 化学式: C₂₂H₄₄P₂Pt
• 分子量: 565.619
• InChiKey: SWXOCPIBXKAULR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.42
• 重原子数：
  25.0
• 可旋转键数：
  9.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为反应物：
  描述：

  cis-[Pt(2,4,6-Me3C6H2)(Me)(PEt3)2] 在 HBF₄ 、 HClO₄ 、 CH₃C₆H₄SO₃H 作用下， 以 甲醇 、 乙醚 为溶剂， 生成 cis-Pt(PEt3)2(C6H2(CH3)3)(MeOH)(1+)
  参考文献：
  名称：

  Alibrandi, Giuseppe; Minniti, Domenico; Scolaro, Luigi Monsù, Inorganic Chemistry, 1988, vol. 27, # 2, p. 318 - 324

  摘要：

  DOI：
• 作为产物：
  描述：

  trans-bromo(mesityl)bis(triethylphosphine)platinum(II) 在 MeLi 作用下， 以 乙醚 为溶剂， 生成 cis-[Pt(2,4,6-Me3C6H2)(Me)(PEt3)2]
  参考文献：
  名称：

  Alibrandi, Giuseppe; Minniti, Domenico; Scolaro, Luigi Monsù, Inorganic Chemistry, 1988, vol. 27, # 2, p. 318 - 324

  摘要：

  DOI：

文献信息

• Synthesis and reactions of mesitylplatinum complexes. Molecular structure of bromo(mesityl)(1,5-cyclooctadiene)platinum(II)
  作者：Kathleen A. Fallis、Gordon K. Anderson、Nigam P. Rath

  DOI：10.1021/om00031a013

  日期：1993.7

  The reaction of [PtCl2(cod)] with mesitylmagnesium bromide yields [PtBr(Mes)(cod)]. The compound crystallizes in the monoclinic space group P2(1)/c with a = 27.151 (5) angstrom, b = 7.987 (2) angstrom, c = 15.308 (2) angstrom, beta = 96.24 (2)degrees, V = 3300.2 (11) angstrom3, and Z = 8. Least-squares refinement converged at R = 0.0776 and R(w) = 0.0641 on the basis of 4049 reflections with F > 4.0sigma(F). The cyclooctadiene may be displaced by PPh3 or PEt3 to give the cis-bis(phosphine) complexes, which isomerize slowly to their trans forms. Carbonylation of trans-[PtBr(Mes)(PEt3)2] leads to the corresponding aroyl complex, but the PPh3 complex shows no tendency to undergo carbonyl insertion. Methylation of [PtBr(Mes)(cod)] yields the mixed organoplatinum complex [PtMe-(Mes)(cod)]. Treatment with HCl results in cleavage of the platinum-mesityl bond exclusively. Reaction of [PtClBz(cod)] with MeMgBr produces [PtMeBz(cod)]. Displacement of the diene from these mixed organoplatinum species by PPh3 or PEt3 generates the corresponding cis-bis(phosphine) compound.
• β-Hydrogen Kinetic Effect
  作者：Raffaello Romeo、Giuseppina D'Amico、Emilia Sicilia、Nino Russo、Silvia Rizzato

  DOI：10.1021/ja0702162

  日期：2007.5.1

  A combined kinetic and DFT study of the uncatalyzed isomerization of cationic solvent complexes of the type cis-[Pt(R')(S)(PR3)(2)](+) (R' = linear and branched alkyls or aryls and S = solvents) to their trans isomers has shown that the reaction goes through the rate-determining dissociative loss of the weakly bonded molecule of the solvent and the interconversion of two geometrically distinct T-shaped 14-electron three-coordinate intermediates. The Pt-S dissociation energy is strongly dependent on the coordinating properties of S and independent of the nature of R'. The energy barrier for the fluxional motion of [Pt(R')(PR3)(2)](+) is comparatively much lower (approximate to 8-21 kJ mol(-1)). The presence of beta-hydrogens on the alkyl chain (R' = Et, Pr-n, and Bu-n) produces a great acceleration of the reaction rate. This accelerating effect has been defined as the beta-hydrogen kinetic effect, and it is a consequence of the stabilization of the transition state and of the cis-like three-coordinate [Pt(R')(PR3)(2)](+) intermediate through an incipient agostic interaction. The DFT optimization of [Pt(R')(PMe3)(2)](+) (R' = Et, Pr-n, and Bu-n) reproduces a classical dihapto Pt center dot center dot center dot center dot eta(2)-HC agostic mode between the unsaturated metal and a dangling C-H bond. The value of the agostic stabilization energy (in the range of approximate to 21-33 kJ mol(-1)) was estimated by both kinetic and computational data and resulted in being independent of the length of the hydrocarbon chain of the organic moiety. A better understanding of such interactions in elusive reaction intermediates is of primary importance in the control of reaction pathways, especially for alkane activation by metal complexes.
• Romeo, Raffaello; Plutino, Maria Rosaria; Elding, Lars I., Inorganic Chemistry, 1997, vol. 36, # 25, p. 5909 - 5916
  作者：Romeo, Raffaello、Plutino, Maria Rosaria、Elding, Lars I.

  DOI：——

  日期：——