(d(t)bpe)Pd(C2(CO2Me)2) | 260447-99-2

• 英文名称: (d(t)bpe)Pd(C2(CO2Me)2)
• CAS: 260447-99-2
• 化学式: C₂₄H₄₆O₄P₂Pd
• 分子量: 566.994
• InChiKey: IDQGQIYDPYUQQY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  (d(t)bpe)Pd(ethene) 以 乙醚 、 正戊烷 为溶剂， 生成 (d(t)bpe)Pd(C2(CO2Me)2)
  参考文献：
  名称：

  cis-(R‘₂PC₂H₄PR‘₂)PdH(SnR₃) Complexes:  Trapped Intermediates in the Palladium-Catalyzed Hydrostannation of Alkynes

  摘要：

  The complexes (R'2PC2H4PR'(2))Pd(C2H4) (R' = Pr-i, Bu-t) react with R3SnH (R = Me, Bu-n) by displacement of the ethene ligand and oxidative addition of the Sn-H bond to generate the chelating phosphane stabilized cis Pd-II hydride stannyl complexes (R'2PC2H4PR'(2))PdH(SnR3) (R' = Pr-i (1), Bu-t (2)). Complex 1a (R' = Pr-i, R = Me), containing the smallest substituents, is only transiently formed but has been detected at -80 degrees C by NMR spectroscopy. It reacts further with Me3SnH, even at -120 degrees C, by eliminating hydrogen to give (d(i)ppe)Pd(SnMe3)(2) (3). In contrast, the isolated (d(i)ppe)PdH((SnBu3)-Bu-n) (Pb) is briefly stable at ambient temperature, whereas the sterically encumbered species (d(t)bpe)PdH(SnR3) (R = Me (2a), Bu-n (2b)) are stable well above 100 degrees C. The molecular structure of 2a has been determined by X-ray crystallography. Complex 2a reacts with 2 equiv of C2R "(2) (R " = CO2Me) to give (d(t)bpe)Pd(C2R "(2)) (4) and predominantly the corresponding (E)-vinylstannane (E)-(R ")(H)C=C(SnMe3)(R ") (E-5). Since 2a also catalyzes the hydrostannation of the alkyne, the cis Pd-II hydride stannyl complexes 1a,b and 2a,b represent trapped intermediates in the Pd-catalyzed hydrostannation of alkynes. The existence of the complexes also sheds light on the mechanism of the Pd-catalyzed degradation of R3SnH into Sn2R6 and H-2.

  DOI：

  10.1021/om9908128