A New Arene-Bridged Diamidophosphine Ligand and Its Coordination Chemistry with Zirconium(IV)
作者:Erin A. MacLachlan、Michael D. Fryzuk
DOI:10.1021/om049165x
日期:2005.3.1
6-Me3C6H2)NLi-2-(5-MeC6H3)]2PPh, [NPN]*Li2, was prepared from (2,4,6-Me3C6H2)(2-Br-4-MeC6H3)NH, nBuLi, and PhPCl2 in Et2O and isolated as a dioxane adduct in ∼85% yield. The solid-state structure of [NPN]*Li2(THF)2 as determined by X-ray diffraction shows both lithiums bridged by the amido nitrogens with one Li ion coordinated to the phosphine donor. The reaction of [NPN]*H2 and Zr(NMe2)4 in toluene produced [NPN]*Zr(NMe2)2
芳烃桥联的二锂二酰胺基膦配体[[(2,4,6-Me 3 C 6 H 2)NLi-2-(5-MeC 6 H 3)] 2 PPh [NPN] * Li 2由(在Et 2 O中的2,4,6-Me 3 C 6 H 2)(2-Br-4-MeC 6 H 3)NH,n BuLi和PhPCl 2分离为二恶烷加合物,收率为〜85%。[NPN] * Li 2(THF)2的固态结构通过X射线衍射测定的结果表明,两个由酰胺氮桥接的锂和一个与磷供体配位的锂离子。[NPN] * H 2和Zr(NMe 2)4在甲苯中的反应产生了[NPN] * Zr(NMe 2)2,分离产率为90%。向[NPN] * Zr(NMe 2)2中添加过量的Me 3 SiCl可以高产率地将其转化为[NPN] * ZrCl 2。通过X射线衍射测定的[NPN] * ZrCl 2的固态结构显示Zr中心是具有膦和氯化物顶端的扭曲的三角双锥体。在邻通过NMR光谱法,在[NPN]