The structures of neutral and ionic 4-cyanophenylpalladium(II) and methylpalladium(II) complexes containing bidentate phosphine ligands were investigated in solution and in the solid state. Diphosphine ligands with a xanthene and a ferrocene backbone were used. New bis(dialkylphosphino) substituted Xantphos ligands were synthesised. 1H NMR and 31P NMR spectroscopy, conductivity measurements, UV-Vis spectroscopy, and X-ray crystallography were used to elucidate the structures of the complexes. Subtle changes of the phosphine ligands govern the coordination mode of the ligand. A variety of bidentate cis-, and trans-coordination and terdentate P–O–P, P–S–P and P–Fe–P coordination modes of the ligands were observed.
研究了中性和离子型4-
氰基苯
钯(II)和甲基
钯(II)复合物的结构,这些复合物含有双齿
磷配体,并在溶液和固态进行研究。采用了以
喹啉和
铁烯为主链的双
膦配体。合成了新的双(烷基
磷基)取代的
Xantphos配体。通过¹H NMR和³¹P NMR光谱、导电性测量、紫外-可见光谱和X射线晶体学来阐明复合物的结构。
磷配体的微小变化决定了
配体的配位方式。观察到了各种双齿顺式和反式配位以及三齿P–O–P、P–S–P和P–Fe–P配位模式。