首页> 外文期刊>Chemistry: A European journal >A Soft Grip: Magnesium Complexes with a Phosphine-Modified Phosphonium Diylidic Lewis Base
【24h】

A Soft Grip: Magnesium Complexes with a Phosphine-Modified Phosphonium Diylidic Lewis Base

机译:轻柔的抓地力:镁与膦修饰的磷化二路易斯基的配合物

获取原文
获取原文并翻译 | 示例
           

摘要

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 access to [{Mg(dppmflu)(-nBu)}(2)], [Mg(dppmflu){N(SiMe3)(2)}], and [{Mg(dppmflu)(-Me)}(2)], which were used as starting materials for further investigations. The reaction of [{Mg(dppmflu)(-nBu)}(2)] with PhSiH3 in the presence of THF allowed isolation of the magnesium hydride complex [{Mg(dppmflu)(-H)(thf)}(2)] without a stabilizing nitrogen donor ligand. Prolonged heating enforced ligand redistribution and [{Mg(dppmflu)(-H)(thf)}(2)] was converted to [Mg(dppmflu)(2)] and MgH2. The homoleptic derivative [Mg(dppmflu)(2)], in which the magnesium center is in a very soft ligand environment, can open a THF molecule by frustrated Lewis pair reactivity to give [{Mg(dppmflu)(-OC(4)H(8)dppmflu)}(2)].
机译:开发了一种简单的策略来获得具有软螯合二碘配体[Ph2PCHPPh2(芴基)](-)(dppmflu(-))的镁配合物,以评估硬酸(阳离子)和软碱(阴离子)失配对稳定性的影响和形成的衍生物的反应性。烷基镁衍生物或氨基镁对前体Ph2PCH2PPh2(flu)(dppmfluH)进行质子化处理可提供[{Mg(dppmflu)(-nBu)}(2)],[Mg(dppmflu){N(SiMe3)(2) }]和[{Mg(dppmflu)(-Me)}(2)],它们被用作进一步研究的起始材料。 [{Mg(dppmflu)(-nBu)}(2)]在THF存在下与PhSiH3的反应可分离氢化镁配合物[{Mg(dppmflu)(-H)(thf)}(2)]。没有稳定的氮供体配体。长时间加热使配体重新分布,并且[{Mg(dppmflu)(-H)(thf)}(2)]转化为[Mg(dppmflu)(2)]和MgH2。均相衍生物[Mg(dppmflu)(2)]中的镁中心处于非常柔软的配体环境中,可以通过沮丧的Lewis对反应性打开THF分子,得到[{Mg(dppmflu)(-OC(4) H(8)dppmflu)}(2)]。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号