Complexes of Bis-<i>o</i><i>rtho</i>-cyclometalated Bisphosphinoaryl Ruthenium(II) Cations with Neutral <i>Meta</i>-bisphosphinoarene Ligands Containing an Agostic C−H···Ru Interaction
作者:Paulo Dani、Mieke A. M. Toorneman、Gerard P. M. van Klink、Gerard van Koten
DOI:10.1021/om0005001
日期:2000.12.1
The synthesis, characterization, and reactivity of various ruthenium(II) complexes [Ru(R−PCP)(R‘−PCHP)][OTf] are presented. These complexes are highly dissymmetric and show fluxional behavior in solution. They contain one monoanionic, η3-P,C,P‘-tridentate-bonded bisphosphinoaryl ligand (R−PCP = [C6H2(CH2PPh2)2-2,6-R-4]-; R = H or Br) and one neutral, trans-P,P‘-bidentate-bonded bisphosphinoarene ligand
介绍了各种钌(II)配合物[Ru(R-PCP)(R'-PCHP)] [OTf]的合成,表征和反应性。这些络合物高度不对称,并在溶液中显示出通量行为。它们含有一个单阴离子,η 3 - P,C,P ' -tridentate键合的配体bisphosphinoaryl(R-PCP = [C 6 H ^ 2(CH 2 PPH 2)2 -2,6-R-4] - ; R = H或Br)和一个中性的反式P,P '双键双膦芳烃配体(R'-PCHP = C 6 H 3(CH 2 PPh 2)2-3,5-R'-1)。CH键即邻位到两个CH 2 PPH 2个的二齿键合的配体的取代基与金属中心(ⅰ相互作用。 ê ,具有与阳离子钌中心的agostic接触)。所述agostic质子的在位置1通过的若干两维NMR技术手段获得的1 H NMR光谱以及在溶液中的这些复合物的三维结构(1 H- 1 ħCOSY,31 P- 1 ħCOZY