Synthesis and Structural Characterization of the First Organosoluble Mononuclear Siloxane and Silylamide of Molybdenum and Tungsten

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• 作者：Rolf Siefken ; Markus Teichert ; Debashis Chakraborty ; and Herbert W. Roesky
• 刊名：Organometallics
• 出版年：1999
• 出版时间：June 7, 1999
• 年：1999
• 卷：18
• 期：12
• 页码：2321 - 2325
• 全文大小：111K
• 年卷期：v.18,no.12(June 7, 1999)
• ISSN：1520-6041

文摘

Reactions of Cp*MCl₄ (Cp* = C₅Me₅, M = Mo, W) with the silanetriol (2,6-i-Pr₂C₆H₃)N(SiMe₃)Si(OH)₃ yield organosoluble metallasiloxanes of the type Cp*MoO[(2,6-i-Pr₂C₆H₃)N(SiMe₃)]₂Si₂O₃(OH)₂ (1) and Cp*WO[(2,6-i-Pr₂C₆H₃)N(SiMe₃)]₂Si₂O₃(OH)₂ (2) possessing the MSi₂O₃core. The above-mentioned compounds can easily be oxidized to the corresponding acyclicproducts containing a chain of two condensed silanetriol moieties bound to the metal asCp*MoO₂[(2,6-i-Pr₂C₆H₃)N(SiMe₃)]₂Si₂O₂(OH)₃ (3) and Cp*WO₂[(2,6-i-Pr₂C₆H₃)N(SiMe₃)]₂Si₂O₂(OH)₃ (4). However, the reactions of the isoelectronic organosilyltriamide (2,6-i-Pr₂C₆H₃)N(SiMe₃)Si(NH₂)₃ with Cp*MoCl₄ resulted in the formation of a mononuclear productCp*MoCl₂N[Si(NH₂)₂N(SiMe₃)(2,6-i-Pr₂C₆H₃)] (5) containing a MoN triple bond.