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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Skeletal rearrangements of an ylidediylphosphane tetramer [German]
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Skeletal rearrangements of an ylidediylphosphane tetramer [German]

机译:yyldiylphosphane四聚体的骨骼重排[德语]

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Condensation of the bis(trimethylsilyl)ylide Ph3PC(SiMe3)(2) with PX3 (X = Cl, Br) yields the ionic tetramers 4a,b of ylidediyl-halophosphanes. Their cations (Ph3PC)(4)P4X3+ possess a tetraphosphabicyclo[2.2.2]octane (or tetraphospha-barrelane) skeleton ([AC](3)BD spin system in P-31 NMR spectra). Reaction of 4a with AlCl3 or GaCl3 converts the singly charged cation into the tetracation (Ph3PC)(4)P-4(4+) having a cubane structure ([AB](4) spin system in the P-31 NMR spectum). SbCl5 oxidizes 4a to give the dication (Ph3PC)(4)P4Cl42+ (counter ion: SbCl52-) with the barrelane skeleton either preserved (7) or rearranged into a tetraphospha-bicylco[3.3.0]octane structure 8. In the latter case the dication contains a central diphosphanedionium bridge. Replacement of a chloro-substituent in 4a by an amino group also gives rise to a further dissociation and a concomitant rearrangement. The resulting dications (Ph3PC)(4)P4NR2Cl2+ possess a tetraphospha-bicyclo-[3.2.1]octane structure (with eight nonequivalent phosphorus atoms). [References: 26]
机译:双(三甲基甲硅烷基)内酯Ph3PC(SiMe3)(2)与PX3(X = Cl,Br)的缩合反应产生了yyldiyl-halophosphanes的离子四聚体4a,b。它们的阳离子(Ph3PC)(4)P4X3 +具有四磷双环[2.2.2]辛烷(或四磷-桶烷)骨架(P-31 NMR光谱中的[AC](3)BD自旋系统)。 4a与AlCl3或GaCl3的反应将单电荷阳离子转化为具有古巴结构的四阳离子(Ph3PC)(4)P-4(4 +)(P-31 NMR光谱中的[AB](4)自旋系统)。 SbCl5氧化4a,得到螯合物(Ph3PC)(4)P4Cl42 +(抗衡离子:SbCl52-),其桶形骨架保留(7)或重新排列成四磷酰二苯基[3.3.0]辛烷结构8。该药包含一个中央二磷杂环戊二烯桥。用氨基取代4a中的氯取代基也引起进一步的离解和伴随的重排。所得的双金属(Ph3PC)(4)P4NR2Cl2 +具有四磷-双环-[3.2.1]辛烷结构(具有八个非等价的磷原子)。 [参考:26]

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