反式-1，2二苯乙烯-D10 | 20748-24-7

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 二苯乙烯类
• 中文名称: 反式-1，2二苯乙烯-D10
• 英文名称: trans-stilbene d10
• 英文别名: trans-Stilbene-D10 (rings-D10)；1,2,3,4,5-pentadeuterio-6-[(E)-2-(2,3,4,5,6-pentadeuteriophenyl)ethenyl]benzene
• CAS: 20748-24-7
• 化学式: C₁₄H₁₂
• 分子量: 190.17
• InChiKey: PJANXHGTPQOBST-FHJPSXJRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.8
• 重原子数：
  14
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  反式-1，2二苯乙烯-D10 以 正己烷 为溶剂， 生成 2,2',3,3',4,4',5,5',6,6'-decadeuterio-cis-stilbene
  参考文献：
  名称：

  Unimolecular reactions in isolated and collisional systems: Deuterium isotope effect in the photoisomerization of stilbene

  摘要：

  The isomerization of t-stilbene (stilbene h12 ) and three deuterated derivatives has been studied in a supersonic expansion, the thermal gas phase, and solution. In the jet we find that almost all effect of full deuteration (stilbene d12 ) is produced by deuteration of the two ethylinic hydrogens only (stilbene d2 ). Complete deuteration of the phenyl rings (stilbene d10 ) has rather little influence on the decay of the jet-cooled molecule. Nonexponential decays are found at intermediate excess energies in the jet-cooled system, with the degree of nonexponentiality decreasing with increasing excess energy. The ordering of the decay rates observed in the jet is not consistent with previous RRKM calculations of the isomerization rates of stilbene h12 and d2. Using similar parameters the calculations consistently place the stilbene d2 and stilbene d10 curves in the wrong order. Our results suggest extensive but not complete vibrational relaxation in the isolated molecule. Vibrational redistribution rapidly becomes complete in the presence of buffer gas. In thermal samples the isomerization rates of stilbene h12 and stilbene d10 are identical over a wide range of solvents and temperatures. By contrast the isomerization rates in stilbene d2 and stilbene d12 are 1.4 and 1.5 times slower than in stilbene h12. Again, these ratios appear constant over a wide range of experimental conditions.

  DOI：

  10.1063/1.455342
• 作为产物：
  描述：

  氯化苄-D5 以82%的产率得到反式-1，2二苯乙烯-D10
  参考文献：
  名称：

  Boche, Gernot; Buckl, Klaus; Martens, Diether, Liebigs Annalen der Chemie, 1980, # 7, p. 1135 - 1171

  摘要：

  DOI：

文献信息

• Palladium catalysed alkyne hydrogenation and oligomerisation: a parahydrogen based NMR investigation
  作者：Joaquín López-Serrano、Simon B. Duckett、John P. Dunne、Cyril Godard、Adrian C. Whitwood

  DOI：10.1039/b804162h

  日期：——

  The role phosphine ligands play in the palladium(II)-bis-phosphine-hydride cation catalysed hydrogenation of diphenylacetylene is explored through a PHIP (parahydrogen induced polarization) NMR study. The precursors Pd(LL′)(OTf)2 (1a–e) [LL′ = dcpe (PCy2CH2CH2PCy2), dppe, dppm, dppp, cppe (PCy2CH2CH2PPh2)] are used. Alkyl palladium intermediates of the type [Pd(LL′)(CHPhCH2Ph)](OTf) (2 and 3) are detected and demonstrated to play an active role in hydrogenation catalysis. Magnetization transfer experiments reveal chemical exchange from the α-H of the alkyl ligand of 2a (LL′ = dcpe) and linkage isomer 2e′ (LL′ = cppe) into trans-stilbene on the NMR timescale. Activation parameters (ΔH≠ and ΔS≠) for this transformation have been determined. These experiments, coupled with GC/MS data, indicate that the catalytic activity is greater in methanol, where it follows the order: dcpe > cppe > dppp > dppe > dppm, than in CD2Cl2. All five of the phosphine systems described are less active than those based on bcope [where bcope is (C8H14)PCH2–CH2P(C8H14)] and tbucope [where tbucope is (C8H14)PC6H4CH2P(tBu)2]. cis, cis-1,2,3,4-Tetraphenyl-buta-1,3-diene is detected as a minor reaction product with Pd(LL′)(PhCH–CHPh–CPhCHPh)+ (4) also being shown to play a role in the alkyne dimerisation step.

  通过PHIP（对氢诱导极化）NMR研究探讨了膦配体在钯(II)-双膦-氢阳离子催化苯基乙炔氢化反应中的作用。使用的前体为Pd(LL′)(OTf)₂（1a-e）[LL′ = dcpe（PCy₂CH₂CH₂PCy₂），dppe，dppm，dppp，cppe（PCy₂CH₂CH₂PPh₂）]。检测到类型为[Pd(LL′)(CHPhCH2Ph)](OTf)（2和3）的烷基钯中间体，并证明其在氢化催化中发挥了积极作用。磁化转移实验揭示了来自2a（LL′ = dcpe）和连接异构体2e′（LL′ = cppe）烷基配体的α-H在NMR时间尺度上与反式stilbene之间的化学交换。已确定该转化的活化参数（ΔH≠和ΔS≠）。这些实验结合GC/MS数据表明，在甲醇中催化活性更强，顺序为：dcpe > cppe > dppp > dppe > dppm，相比之下在CD₂Cl₂中活性较低。所描述的五种膦配体系统的活性均低于基于bcope（其中bcope为(C₈H₁₄)PCH₂–CH₂P(C₈H₁₄)）和tbucope（其中tbucope为(C₈H₁₄)PC₆H₄CH₂P(tBu)₂）的系统。检测到顺-顺-1,2,3,4-四苯基-丁-1,3-二烯作为次要反应产物，同时Pd(LL′)(PhCH–CHPh–CPhCHPh)⁺（4）在炔烃二聚化步骤中也显示出作用。
• Palladium-Catalyzed Hydrogenation:  Detection of Palladium Hydrides. A Joint Study Using Para-Hydrogen-Enhanced NMR Spectroscopy and Density Functional Theory
  作者：Joaquín López-Serrano、Simon B. Duckett、Agustí Lledós

  DOI：10.1021/ja0630137

  日期：2006.8.1

  Pd(PEt3)2(OTf)2, acting as an in situ source of Pd(PEt3)2, reacts with an alkyne and hydrogen via phosphine loss to form the detectable hydride-containing species Pd(PEt3)2(H)(CHPhCH2Ph), cis- and trans-Pd(PEt3)2(H)(CPh=CHPh), and Pd2(PEt3)3(H)(CHPhCH2Ph)2+, which map onto the reaction scheme predicted by density functional theory.
• Boche, Gernot; Buckl, Klaus; Martens, Diether, Liebigs Annalen der Chemie, 1980, # 7, p. 1135 - 1171
  作者：Boche, Gernot、Buckl, Klaus、Martens, Diether、Schneider, Dieter R.

  DOI：——

  日期：——
• Unimolecular reactions in isolated and collisional systems: Deuterium isotope effect in the photoisomerization of stilbene
  作者：Scott H. Courtney、Michael W. Balk、Laura A. Philips、Steven P. Webb、Ding Yang、Donald H. Levy、Graham R. Fleming

  DOI：10.1063/1.455342

  日期：1988.12

  The isomerization of t-stilbene (stilbene h12 ) and three deuterated derivatives has been studied in a supersonic expansion, the thermal gas phase, and solution. In the jet we find that almost all effect of full deuteration (stilbene d12 ) is produced by deuteration of the two ethylinic hydrogens only (stilbene d2 ). Complete deuteration of the phenyl rings (stilbene d10 ) has rather little influence on the decay of the jet-cooled molecule. Nonexponential decays are found at intermediate excess energies in the jet-cooled system, with the degree of nonexponentiality decreasing with increasing excess energy. The ordering of the decay rates observed in the jet is not consistent with previous RRKM calculations of the isomerization rates of stilbene h12 and d2. Using similar parameters the calculations consistently place the stilbene d2 and stilbene d10 curves in the wrong order. Our results suggest extensive but not complete vibrational relaxation in the isolated molecule. Vibrational redistribution rapidly becomes complete in the presence of buffer gas. In thermal samples the isomerization rates of stilbene h12 and stilbene d10 are identical over a wide range of solvents and temperatures. By contrast the isomerization rates in stilbene d2 and stilbene d12 are 1.4 and 1.5 times slower than in stilbene h12. Again, these ratios appear constant over a wide range of experimental conditions.