Reaction of [RhH(PEt3)4]
(9) with hexafluoropropene (1) affords the CâF activation product [Rh(Z)-CFCF(CF3)}(PEt3)3]
(4) as well as Et3P(F)(Z)-CFCF(CF3)}
(11). In contrast, addition of (E)-1,2,3,3,3-pentafluoropropene (8) to 9 yields [Rh(E)-C(CF3)CHF}(PEt3)3]
(12) together with [RhF(PEt3)3]
(6) and (Z)-1,3,3,3-tetrafluoropropene (10). Treatment of 12 with hydrogen effects the formation of 1,1,1-trifluoropropane (2) and the fluoro compounds [RhF(PEt3)3]
(6) and cis-mer-[Rh(H)2F(PEt3)3]
(7). On treatment of 6 or of a mixture of 6 and 7 with HSiPh3 the complexes [RhH(PEt3)3]
(3) and cis-fac-[Rh(H)2(SiPh3)(PEt3)3]
(13) are obtained. Both compounds are capable of the CâF activation of hexafluoropropene (1) to afford 4. The molecular structure of complex 13 has been determined by X-ray crystallography.
[RhH(PEt3)4]的反应
(9) 与
六氟丙烯 (1) 反应得到 C−F 活化产物 [Rh(Z)-CFCF(
CF3)}(PEt3)3]
(4) 以及 Et3P(F)(Z)-CFCF( )}
(11)。相反,将
(E)-1,2,3,3,3-五氟丙烯(8)添加到9中得到[Rh(E)-C( )CHF}(PEt3)3]
(12) 与[RhF(PEt3)3]一起
(6)和(Z)-1,3,3,3-四
氟丙烯(10)。用
氢气处理 12 会形成
1,1,1-三氟丙烷 (2) 和
氟化合物 [RhF(PEt3)3]
(6) 和顺式-mer-[Rh(H)2F(PEt3)3]
(7)。用 HSiPh3 处理 6 或 6 和 7 的混合物,得到配合物 [RhH(PEt3)3]
(3) 和 cis-fac-[Rh(H)2(SiPh3)(PEt3)3]
得到式(13)。两种化合物都能够对
六氟丙烯 (1) 进行 C→F 活化,生成 4。配合物 13 的分子结构已通过 X 射线晶体学测定。