Exploiting Deprotonative Co‐complexation to Access Potassium Metal(ates) Supported by a Bulky Silyl(bis)amide Ligand
作者:Pasquale Mastropierro、Alan R. Kennedy、Eva Hevia
DOI:10.1002/ejic.202001051
日期:2021.3.19
KCH2SiMe3 yielding [Ph2Si(NHAr*)(NAr*)K}∞] (2), which, in turn, undergoes co‐complexation with the relevant M(CH2SiMe3)2 (M=Mg, Zn, Mn) enabling metallation of the remaining NHAr* group to furnish silylbis(amido) alkyl potassium metal(ates) [Ph2Si(NAr*)2M(THF)x(CH2SiMe3)}−K(THF)y}+] (M=Zn, x=0, y=4, 3; M=Mg, x=1, y=3, 4; and M=Mn, x=0, y=4, 5). Reactivity studies of potassium manganate 5 with the amine
结合了碱金属和较低正电性金属的双金属配合物已显示出独特的化学特征,可以在化学合作性方面进行合理化。为了合理设计这些类型的配合物,描述了一种适用的方法来制备新的钾金属家族,其中包含高度空间要求的甲硅烷基(双)酰胺Ph 2 Si(NAr *)2 } 2-(Ar * = 2,6-二异丙基苯基)。使用顺序去质子共络合方法,使用烷基钾KCH 2 SiMe 3产生[Ph 2 Si(NHAr *)(NAr *)K}来实现Ph 2 Si(NHAr *)2(1)的单金属化。∞ ](2),然后与相关的M(CH 2 SiMe 3)2(M = Mg,Zn,Mn)进行复合,从而使剩余的NHAr *基团金属化,从而提供甲硅烷基双(酰胺基)烷基钾金属盐[Ph 2 Si(NAr *)2 M(THF)x(CH 2 SiMe 3)} - K(THF)y } + ](M = Zn,x = 0,y = 4,3 ; M =