Molecular Zinc Hydride Cations [ZnH]
<sup>+</sup>
: Synthesis, Structure, and CO
<sub>2</sub>
Hydrosilylation Catalysis
作者:Florian Ritter、Thomas P. Spaniol、Iskander Douair、Laurent Maron、Jun Okuda
DOI:10.1002/anie.202011480
日期:2020.12.14
[ZnH2]n with the conjugated Brønsted acid of the bidentate diamine TMEDA (N,N,N′,N′‐tetramethylethane‐1,2‐diamine) and TEEDA (N,N,N′,N′‐tetraethylethane‐1,2‐diamine) gave the zinc hydride cation [(L2)ZnH]+, isolable either as the mononuclear THF adduct [(L2)ZnH(thf)]+[BArF4]− (L2=TMEDA; BArF4−=[B(3,5‐(CF3)2‐C6H3)4]−) or as the dimer [(L2)Zn)}2(μ‐H)2]2+[BArF4]−2 (L2=TEEDA). In contrast to [ZnH2]n, the
[ZnH 2 ] n与二齿二胺 TMEDA(N , N , N',N' -四甲基乙烷-1,2-二胺)和 TEEDA(N , N , N' , N' -四乙基乙烷)的共轭布朗斯台德酸进行质子化‐1,2-二胺)得到氢化锌阳离子 [(L 2 )ZnH] +,可作为单核 THF 加合物分离 [(L 2 )ZnH(thf)] + [BAr F 4 ] - (L 2 =TMEDA ; BAr F 4 − =[B(3,5-(CF 3 ) 2 ‐C 6 H 3 ) 4 ] − ) 或作为二聚体 [(L 2 )Zn)} 2 (μ-H) 2 ] 2 + [BAr F 4 ] − 2 (L 2 =TEEDA)。与[ZnH 2 ] n相比,阳离子氢化锌具有热稳定性并且可溶于THF。[(L 2 )ZnH] +也被证明可以形成难以捉摸的中性[(L 2 )ZnH 2 ]的双核和三核加合物。所有含氢化物的阳离子都很容易插入CO