Aryldihydroborane Coordination to Iridium and Osmium Hydrido Complexes

详细信息    查看全文

• 作者：Nicole Arnold ; Silvia Mozo ; Ursula Paul ; Udo Radius ; Holger Braunschweig
• 刊名：Organometallics
• 出版年：2015
• 出版时间：December 28, 2015
• 年：2015
• 卷：34
• 期：24
• 页码：5709-5715
• 全文大小：431K
• ISSN：1520-6041

文摘

A series of iridium dihydroborate complexes [(^tBuPOCOP)IrH(κ²-H₂BHR)] (^tBuPOCOP = κ³-C₆H₃-1,3-[OP^tBu₂]₂; R = Mes = 2,4,6-Me₃C₆H₂; R = Dur = 2,3,5,6-Me₄C₆H) and [LIrH(κ²-H₂BHDur)] (L = ^tBuPCP = κ³-C₆H₃-1,3-[CH₂P^tBu₂]₂, L = η⁵-C₅Me₅) and an osmium dihydroborate compound [OsH(κ²-H₂BHDur)(CO)(PⁱPr₃)₂] have been prepared by using two different synthetic strategies. The first approach is based on direct borane coordination to the metal center, whereas the second is based on a salt-elimination protocol using the lithium salts Li[H₃BR] (R = Mes or Dur) and the corresponding metal halides. The compounds have been characterized by multinuclear NMR and IR spectroscopy and X-ray diffraction analysis. The results constitute the first syntheses of κ²-σ:σ-dihydroborate complexes featuring bulky aryl groups.