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P−P Condensation and P−N/P−P Bond Metathesis: Facile Synthesis of Cationic Tri‐ and Tetraphosphanes

Taube, Clemens ; Schwedtmann, Kai ; Noikham, Medena ; Somsook, Ekasith ; Hennersdorf, Felix ; Wolf, Robert ; Weigand, Jan J.



Abstract

[LC (R) P((PhP)(2)C2H4)][OTf] (4 a,b[OTf]) and [(LCP)-P-iPr(PPh2)(2)][OTf] (5 b[OTf]) were prepared from the reaction of imidazoliumyl-substituted dipyrazolylphosphane triflate salts [LC (R) P(pyr)(2)][OTf] (3 a,b[OTf]; a: R=Me, b=iPr; L-C (R)=1,3-dialkyl-4,5-dimethylimidazol-2-yl; pyr=3,5-dimethylpyrazol-1-yl) with the secondary phosphanes PhP(H)C2H4P(H)Ph) and Ph2PH. A stepwise double P-N/P-P ...

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