Versatile Bulky N,N′,N′-Substituted 1,2-Ethanediamine Ligands and Their Lithium, Aluminium, and Gallium Derivatives
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- 作者：Robert Kretschmer ; Maximilian Dehmel and Michael Bodensteiner
- 刊名：European Journal of Inorganic Chemistry
- 出版年：2017
- 出版时间：February 03, 2017
- 年：2017
- 卷：2017
- 期：5
- 页码：965-970
- 全文大小：898K
- ISSN：1099-0682c
文摘
Sterically demanding N,N′,N′-substituted 1,2-ethanediamine ligands have been prepared from commercially available starting materials by applying a facile one-step procedure. These ligands offer advantages compared to known systems: a suppressed delocalization due to the saturated backbone inhibits a noninnocent behaviour and the low symmetry of the related metal complexes makes them potential candidates for asymmetric catalysis. The ligands are readily transformed into the corresponding lithium derivatives 4, which in turn act as starting materials to access the corresponding aluminium and gallium dichlorides 5 and 6, respectively. In addition, deprotonation by Al(CH3)3 gives rise to the related dimethylalane 7. All main-group element compounds have been studied by means of single X-ray crystallography and spectroscopic methods.