ether substituents. The electron deficiency of the Ru(II) centre in these complexes is likely responsible for how readily they are dealkylated to yield the aryloxide complexes. Complex 3 is not susceptible to ligand-assisted dealkylation, primarily because the lower steric demand of its phosphine-ether ligand permits the thermodynamically favoured direct attack of phosphines at the Ru centre.
制备和三个表征的[Ru(联
吡啶)2(卟P,ö)](PF 6)2层的复合物,其中报道POR = 2- methoxyphenyldiphenylphosphine在1,2- ethoxyphenyldiphenylphosphine在2和2-methoxyethyldiphenylphosphine 3。配合物1和2通过相同的弱碱性膦经历
配体辅助的O-脱烷基化,对于包含具有多个醚取代基的高碱性膦的配合物,通常观察到该反应。Ru(II这些络合物中的中心可能是造成它们脱烷基化产生芳基氧化物络合物的难易程度的原因。配合物3不易受
配体辅助的脱烷基作用,主要是因为其膦-醚
配体的较低的空间需求使得膦在Ru中心热力学上有利于直接攻击。