Highly distorted d8-rhodium(+I) and d10-rhodium(-I) complexes: synthesis, reactivity, and structures in solution and solid state
作者:Stephan Deblon、Heinz Rüegger、Hartmut Schönberg、Sandra Loss、Volker Gramlich、Hansjörg Grützmacher
DOI:10.1039/b002906h
日期:——
yield anionic rhodate complexes [Rh(RCH2troppph)(metroppph)]− (R = H, Me, n-Bu, Ph) that formally have a d10 valence electron configuration. The rhodate [Rh(metroppph)2]− can be obtained directly by reduction of cation [Rh(metroppph)2]+ with alkali metals. In a sym-proportionation reaction [Rh(metroppph)2]+ and [Rh(metroppph)2]− give the neutral d9-[Rh(metroppph)2] radical (K = 1.1 × 107), which is
为了制备高度扭曲的四配位铑(+ I)配合物,开发了新的配体5-二苯基膦基-10-甲基-5 H-二苯并[ a,d ]环庚烯(Me tropp ph)的合成。所述配体我tropp的pH包含在刚性船式构象一个环庚三烯环,使得博士2 P和烯烃结合位点是完全布置用于过渡金属络合。4个当量的我tropp pH值与反应的[Rh 2(μ-Cl)的2(COD)2 ]在KPF的存在6 得到几乎定量的[Rh(+ I)(me tropp ph)2 ] PF 6,其以暗红色-紫罗兰色晶体形式分离。的晶体结构分析表明铑中心中的协调球体的[Rh(+我)(我tropp pH值)2 ] +强烈从正方形平面排列(偏移φ = 42°)。在一个甲基的[Rh(+我)(我tropp pH值)2 ] +可以通过甲部被去质子吨,得到烯丙基复杂的[Rh(烯丙基tropp ph)( me tropp ph)]。该复合物的结构可以最好地描述为扭曲的三角双锥体。氢化硼[BEt