Controlled Reactivity of Terminal Cyaphide Complexes: Isolation of the 5-Coordinate [Ru(dppe)<sub>2</sub>(C≡P)]<sup>+</sup>
作者:Madeleine C. Levis、Kyle G. Pearce、Ian R. Crossley
DOI:10.1021/acs.inorgchem.9b02471
日期:2019.11.4
cyaphide complex trans-[Ru(dppe)2Me(C≡P)] is obtained in excellent yields and exhibits the first instance of controlled reactivity of any terminal cyaphide complex. Its treatment with ZnX2/PPh3 effects selective metathesis of the methyl moiety to afford the unprecedented halocyaphide complexes trans-[Ru(dppe)2(X)(C≡P)] (X = Cl, Br, I), which are structurally characterized (X = Cl, Br). Exemplified with
新型氰化物络合物反式-[[Ru(dppe)2 Me(C≡P)]以优异的产率获得,并且显示了任何末端氰化物络合物可控反应性的第一个实例。它与ZNX治疗2 / PPH 3个甲基部分,得到前所未有halocyaphide的作用选择性复分解络合物的反式- [茹(DPPE)2(X)(C≡P)](X =氯,溴,I),其是结构上表征(X = Cl,Br)。以反溴化物为例,这些化合物易于被亲核试剂取代卤化物,如Me 2所示镁,也很容易被TlOTf卤化,得到第一个低配位氰化物络合物,即[Ru(dppe)2(C≡P)]·OTf。NMR光谱和晶体学数据表明,后者采用方金字塔形的几何结构,且具有易于接近的坐标空位,易于添加亲核试剂。通过与Me 2 Mg和LiC≡CPh的反应及其易发生的本体羰基化反应得到反式-[Ru(dppe)2(CO)(C≡P)] +进行分析说明。