Low-Valent Chemistry: An Alternative Approach to Phosphorus-Containing Oligomers

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• 作者：Stephanie C. Kosnik ; Gregory J. Farrar ; Erin L. Norton ; Benjamin F. T. Cooper ; Bobby D. Ellis ; Charles L. B. Macdonald
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：December 15, 2014
• 年：2014
• 卷：53
• 期：24
• 页码：13061-13069
• 全文大小：475K
• ISSN：1520-510X

文摘

A convenient preparative approach to low-valent phosphorus-rich oligomers is presented. Ligand substitution reactions involving anionic diphosphine ligands of the form [(PR₂)₂N]^{鈭?/sup> and [(PPh₂)₂C₅H₃]鈭?/sup> and a triphosphenium bromide PI precursor result in the formation of phosphorus(I)-containing heterocycles, several of which are of types that have never been prepared before. The methodology described also allows for the preparation of the known heterocycle cyclo-[P(PPh₂)N(PPh₂)]₂ in better yields and purity than the synthetic approach reported previously. Preliminary reactivity studies demonstrate the viability of such zwitterionic oligomers as multidentate ligands for transition metals.}