Zirconium and Hafnium Hydrazinediido Half-Sandwich Complexes: Synthesis and Reactivity
作者:Peter D. Schweizer、Hubert Wadepohl、Lutz H. Gade
DOI:10.1021/om500087s
日期:2014.4.14
The hydrazinediido complexes [Cp*M(NxylN)(NNPh2)(dmap)] (M = Zr, 3a; M = Hf, 3b; NxylN = 2-(N-xylylamino)pyrrolinate) have been synthesized, and their reactivity has been investigated. Both complexes were prepared from [Cp*M(NxylN)Cl2] (1a,b) and [Cp*M(NxylN)(NHNPh2)Cl] (2a,b), respectively, as precursors. While 3a was obtained by dehydrohalogenation of 2a using LiHMDS in the presence of dmap, reaction
合成了肼二胺配合物[Cp * M(N xyl N)(NNPh 2)(dmap)](M = Zr,3a ; M = Hf,3b ; N xyl N = 2-(N -xylylamino)pyrrolinate),并且已经研究了它们的反应性。两种络合物分别由[Cp * M(N xyl N)Cl 2 ](1a,b)和[Cp * M(N xyl N)(NHNPh 2)Cl](2a,b)制备,作为前体。尽管在dmap存在下使用LiHMDS通过2a的脱卤化氢获得3a,但2b的反应首先用LiHMDS制备[Cp * Hf(N xyl N)(NHNPh 2)2 ](6)和[Cp * Hf(N xyl N)(NNPh 2)LiHMDS](4)的混合物,然后在dmap的存在会产生3b。的[Cp * Zr的(N XYL N)(NNPh 2)吡啶(DMAP)(图3a)与二异丙基反应,得到重排的[2 + 2]环加成产物的[Cp