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Influences of Steric Factors on the Reactivity and Structure of Diorganoalkoxysilylamides
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.4 ) Pub Date : 2020-07-07 , DOI: 10.1002/zaac.202000039
Lukas Zibula 1 , Moritz Achternbosch 1 , Jonathan Wattenberg 1 , Felix Otte 1 , Carsten Strohmann 1
Affiliation  

The combination of an alkoxy and an amino function combined in one silane is rarely found due to the difficult synthesis and isolation.[1] However, this combination offers unique opportunities to investigate the influence of steric requirements or the size of a metal on the structure or reactivity of alkoxysilylamides towards electrophiles by varying the metallating reagent (n‐butyllithium or di‐n‐butylmagnesium) or the organo group on the amino function. For this purpose, we synthesized two alkoxyaminosilanes with acidic NH units that can be metalated. On the one hand, the tert‐butylamino‐substituted (tert‐butylamino)‐methoxydiphenylsilane (1) and on the other hand the isopropylamino‐substituted methoxydiphenyl(isopropylamino)silane (2). The resulting structures showed an interesting interrelation between the Si–O or Si–N bond lengths and the strength of the coordinative bond to the corresponding metal cation (lithium or magnesium).

中文翻译:

立体因素对二有机烷氧基甲硅烷基酰胺反应性和结构的影响

由于难于合成和分离,很少发现烷氧基和氨基官能团结合在一种硅烷中。[1]但是,这种组合提供了独特的机会,可以通过改变金属化试剂(丁基锂或二丁基镁)或金属来研究空间要求或金属大小对烷氧基甲硅烷基酰胺对亲电试剂的结构或反应性的影响。氨基官能团上的有机基团。为了这个目的,我们合成了具有可以被金属化的酸性NH单元的两种烷氧基氨基硅烷。一方面是叔丁基氨基取代的(叔丁基氨基)甲氧基二苯基硅烷1),另一方面是丙氨基取代methoxydiphenyl(异丙氨基)硅烷(2)。所得的结构显示出Si–O或Si–N键长与对应金属阳离子(锂或镁)的配位键强度之间有趣的相互关系。
更新日期:2020-07-07
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