A Soft Grip: Magnesium Complexes with a Phosphine-Modified Phosphonium Diylidic Lewis Base
作者:Jens Langer、Irina Kosygin、Ralph Puchta、Jürgen Pahl、Sjoerd Harder
DOI:10.1002/chem.201603775
日期:2016.11.21
Simple strategies to obtain magnesium complexes with the soft chelating diylidic ligand [Ph2PCHPPh2(fluorenylidene)]− (dppmflu−) were developed to evaluate the influence of the hard acid (cation) and soft base (anion) mismatch on the stability and reactivity of the formed derivatives. Deprotonation of the precursor Ph2PCH2PPh2(flu) (dppmfluH) by an alkylmagnesium derivative or magnesium amide provided
简单的策略,以获得镁配合物与软螯合diylidic配体[PH 2 PCHPPh 2(芴基)] -(dppmflu - )上的稳定性被开发来评估硬酸(阳离子)和软碱(阴离子)的影响失配和形成的衍生物的反应性。该前体的Ph去质子化2 PCH 2 PPH 2通过烷基镁衍生物或氨基镁提供访问(流感)(dppmfluH)[的Mg(dppmflu)(μ -n丁基)} 2 ],[Mg(上dppmflu)N( SiMe 3)2 }]和[Mg(dppmflu)(μ - Me)} 2],用作进一步研究的起始材料。[Mg(dppmflu)(μ‐ n Bu)} 2 ]与PhSiH 3在THF存在下的反应可分离氢化镁配合物[Mg(dppmflu)(μ ‐ H)(thf)} 2 ]没有稳定的氮供体配体。长时间加热迫使配体重新分布,[Mg(dppmflu)(μ ‐ H)(thf)} 2 ]转化为[Mg(dppmflu)2