Synthesis of a New Multidentate Phosphane Ligand C6H2(CH2PPh2)4-1,2,4,5 − X-ray Structure of a Dinuclear Ruthenium(II)-Bridged Complex: [{RuCl2(PPh3)}2{C6H2(CH2PPh2)4-1,2,4,5-P,P′,P′′,P′′′}]
作者:Pablo Steenwinkel、Sebastiaan Kolmschot、Robert A. Gossage、Paulo Dani、Nora Veldman、Anthony L. Spek、Gerard van Koten
DOI:10.1002/(sici)1099-0682(199804)1998:4<477::aid-ejic477>3.0.co;2-u
日期:1998.4
yield. The reaction of 6 with [RuCl2(PPh3)4] in CH2Cl2 afforded the green dinuclear ruthenium(II) coordination complex [RuCl2(PPh3)}2C6H2- (CH2PPh2)4-1,2,4,5-P,P′,P′′,P′′′}]·0.5 CH2Cl2 (8), in 39% isolated yield. The solid-state molecular geometry of 8, determined by X-ray analysis, shows that the tetraphosphane is ortho-P,P′-chelated to each of the two [RuIICl2(PPh3)] units.
四(氧化膦)C6H2CH2P(O)Ph2}4-1,2,4,5 (5),已从 C6H2(CH2Br)4-1,2,4 的 Arbuzov 反应中以高收率制备, 5 (4),过量(7 当量)Ph2POEt。随后在 C6H4Cl2-1,2 中用 HSiCl3(12 当量)还原 5,以高产率得到新的四膦 C6H2(CH2PPh2)4-1,2,4,5 (6)。6与[RuCl2(PPh3)4]在CH2Cl2中反应得到绿色双核钌(II)配位络合物[RuCl2(PPh3)}2C6H2-(CH2PPh2)4-1,2,4,5-P, P',P'',P'''}]·0.5 CH2Cl2 (8),分离产率为 39%。通过 X 射线分析确定的 8 的固态分子几何结构表明,四磷烷与两个 [RuIICl2(PPh3)] 单元中的每一个都发生邻位 P,P' 螯合。