This communication describes the synthesis of a series of diphosphine Ni^II(Ph)(CF₃) complexes and studies of their reactivity toward oxidatively induced Ph–CF₃ bond-forming reductive elimination. Treatment of these complexes with the one-electron outer-sphere oxidant ferrocenium hexafluorophosphate (FcPF₆) affords benzotrifluoride, but the yield varies dramatically as a function of diphosphine ligand. Diphosphines with bite angles of less than 92° afforded <10% yield of PhCF₃. In contrast, those with bite angles between 95 and 102° formed PhCF₃ in yields ranging from 62 to 77%.

中文翻译：

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二膦镍配合物的氧化诱导芳基-CF ₃偶联

本交流介绍了一系列二膦Ni ^II（Ph）（CF ₃）配合物的合成，以及它们对氧化诱导的Ph–CF ₃键形成的还原消除反应的研究。用单电子外层氧化剂六氟磷酸铯铈（FcPF ₆）处理这些配合物可得到三氟化苯，但收率随二膦配体的变化而显着变化。咬合角小于92°的二膦类化合物的PhCF ₃收率<10％。相比之下，咬合角度在95°至102°之间的化合物形成的PhCF ₃产率在62％至77％的范围内。