[Ru2[μ-η1:η1-C(Ph)C(H)](CO)4(μ-dppm)2] | 649561-75-1

• 英文名称: [Ru2[μ-η1:η1-C(Ph)C(H)](CO)4(μ-dppm)2]
• CAS: 649561-75-1
• 化学式: C₆₂H₅₀O₄P₄Ru₂
• 分子量: 1185.11
• InChiKey: PJUHTQXGEBTQLS-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  [Ru₂(CO)₄(μ-CO)(μ-dppm)₂] 、 苯乙炔 以 氘代甲苯 为溶剂， 生成 [Ru2[μ-η1:η1-C(Ph)C(H)](CO)4(μ-dppm)2]
  参考文献：
  名称：

  Selective head-to-tail dimerization of phenylacetylene catalyzed by a diruthenium μ-methylene complex

  摘要：

  The mu-methylene complex [Ru-2(mu-CH2)(CO)(4)(mu-dppm)(2)] (1) in toluene solution at 75 degreesC is the first known catalyst for the selective dimerization of PhC=CH or of PhC=CD to give the head-to-tail dimer PhC=CC(Ph)=CH2 or PhC=CC(Ph)-CD2 respectively, probably by a mechanism involving alkenyl-alkynyl group coupling at the diruthenium center. After many turnovers, a new diruthenium complex was detected and identified as [Ru-2{mu-eta(2)-PhCCH}(CO)(4)(mu-dppm)(2)] (2) which was not an active catalyst for the dimerization reaction, and the organic product PhCCMe was also detected at this stage. Complex 2 was prepared more readily by reaction of PhCCH with [Ru-2(mu-CO)(CO)(4)(mu-dppm)(2)] (3) in toluene at 75 degreesC. The reaction of 1 with a large excess of PhCCH gave further oligomerization and the major products were identified as an octamer and hexamer of PhCCH. Complex 1 was a catalyst for the dimerization of 1-hexyne to a mixture of dimerization products E-BuC=C-CH=CHBu and BuC=C-C(Flu) CH2 in a ratio of about 2: 1, and also for polymerization of HCCH, but it failed to react with the alkynes PhCCMe, PhCCPh or 3-hexyne at 75 degreesC in toluene. (C) 2002 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0020-1693(02)01498-6