Syntheses of P-aryl- and P-alkyl substituted 2,2′,6,6′-tetraphosphanyl-1,1′-biphenyls

Three new examples of 2,2′,6,6′-tetraphosphanyl-1,1′-biphenyls were prepared by electrophilic reaction with chlorophosphanes or palladium catalyzed phosphanylation. The coordination behavior of these new tetraphosphanes towards the widely employed PdCl2 source Pd(COD)Cl2 was investigated by means of NMR spectroscopy.106