高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (10): 1345.

• 研究论文 • 上一篇    下一篇

Pd2X2(dpm)2(X=Cl-,Br-,I-)与H2S反应的低温NMR研究

翁维正   

  1. 厦门大学化学系 厦门 361005
  • 收稿日期:1993-02-28 修回日期:1993-05-05 出版日期:1993-10-24 发布日期:1993-10-24
  • 作者简介:翁维正, 男, 32岁, 博士, 讲师.

Low Temperature NMR Study on the Reactions Between Pd2X2(dpm)2(X=Cl-, Br-, I-) and H2S

WENG Wei-Zheng   

  1. Department of Chemistry, Xiamen University, Xiamen, 361005
  • Received:1993-02-28 Revised:1993-05-05 Online:1993-10-24 Published:1993-10-24

摘要: 采用低温NMR技术考察了配合物Pd2X2(dpm)2(X=Cl-,Br-,I-;dpm=Ph2PCH2PPh2)与H2S在CD2Cl2溶液中的反应,对反应中间体进行了详细的表征.结果表明,反应首先由H2S对Pd2X2(dpm)2的Pd-Pd键氧化加成,形成相应的带有Pd-H和Pd-SH的中间体,该中间体随后脱去H2并转化为相应的S2-桥联的配合物Pd2X2(dpm)2(μ-S).

关键词: 双二苯膦基甲烷的双核一价钯配合物, 硫化氢, 反应中间体, 低温核磁共振

Abstract: Low temperature NMRtechnique was used to investigate the reactions of H2Sand Pd2X2 (dpm)2(X=Cl-, Br-, I- ; dpm=Ph2PCH2PPh2) in CD2Cl2.The detail NMRdata for the reaction intermediate are presented which show that the reactions form the corresponding bridged-sulfide complexes via oxidative-addition of H2Sacross the Pd-Pd bond of Pd2X2(dpm)2 to give a hydrido(mercapto)intermediate, which subsequently liberates H2 to give Pd2X2(dpm)2(μ-S) species.

Key words: Dinuclear Pd(Ⅰ) complex containing bis(diphenylphosphino)methane, Hydrogen sul-fide, Reaction intermediate, Low temperature NMR

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