electron-poor aryl group. Independent preparation of 3f−g and studies on their thermal decomposition with added PEt3 confirmed that selective β-aryl elimination occurs to generate aryl complex 1g and the corresponding ketones. Analogous β-aryl eliminations from bis-phosphine rhodium(I) alkoxo complexes 3a−e and trisphosphine rhodium(I) alkoxo complexes 4b−e were also studied, and the kinetic results were most
制备了一系列的三(
三乙基膦)-连接的
有机铑(I)配合物,并研究了它们与电子贫芳基腈和二芳基酮的反应。[(PEt 3)3 Rh(Ar)](Ar =苯基(1a)或邻-茴香基(1e))与过量的电子贫芳基Ar'C≡N(Ar'= p -CF 3 C 6 H 4或3,5-bis(CF 3)C 6 H 3)形成Rh(I)亚
氨基络合物(PEt 3)3 Rh [N═C(Ar)(Ar')]}(2h - j) 。相反,3,5-bis(CF 3)C 6 H 3 CN没有插入芳基
铑(I)配合物[(PEt 3)3 Rh(Ar)](Ar = p -CF 3 C 6 H 4(1f)或3, 5-双(CF 3)C 6 H 3(1g)),含有更多的贫电子芳基。腈插入的动力学数据与涉及初始
配体解离,随后经典的迁移插入的途径最一致。
亚胺基络合物2i - j在较高温度下通过β-芳基消除而分解,同时电子侧差的芳基3,5-双(CF 3)C