Borane-Bridged Ruthenium Complex Bearing a PNP Ligand: Synthesis and Structural Characterization

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• 作者：Yijing Xu ; Christoph A. Rettenmeier ; Gudrun T. Plundrich ; Hubert Wadepohl ; Markus Enders ; Lutz H. Gade
• 刊名：Organometallics
• 出版年：2015
• 出版时间：October 26, 2015
• 年：2015
• 卷：34
• 期：20
• 页码：5113-5118
• 全文大小：395K
• ISSN：1520-6041

文摘

Reaction of the precursor complex [RuHCl(CO)(PPh₃)₃] with the PNP protioligand CbzdiphosH in toluene resulted in the formation of two stereoisomeric hydrido complexes, [(CbzdiphosH)RuHCl(CO)] (A). The addition of a strong base (KO^tBu or LiEt₃BH), on the other hand, led to the formation of the 1,2-dehydrochlorination product [(Cbzdiphos)RuH(CO)]. The reaction of the latter with BH₃路THF at room temperature led to the 1,2-addition of the BH₃ moiety to the Ru鈥揘 function, forming a RuNBH cycle in [(CbzdiphosHBH₂)RuH(CO)] (B). The same borane-bridged compound was obtained when complex A was treated with NaBH₄ in THF. The BH₂ group forms a bridging unit between the carbazole-N atom and one of the ruthenium-bound hydrides.