作者:Edmunds Lukevics、Luba Ignatovich、Sergey Belyakov
DOI:10.1016/s0022-328x(99)00378-2
日期:1999.10
Figure options(R=H (I), 4-CH3 (II), 3-CH3 (III), 2-CH3 (IV)), have been obtained to study the influence of a substituent position on coordination of the germanium atom. Compounds I–IV were prepared by the insertion of GeBr2 into the carbonbromine bond of the corresponding arylbromide, conversion of aryltribromogermanes to triethoxy derivatives by alcoholysis and their transalkoxylation with triethanolamine
已获得芳基香叶烷的晶体图选项(R = H(I),4-CH 3(II),3-CH 3(III),2-CH 3(IV)),以研究取代基位置的影响关于锗原子的配位。化合物I – IV的制备方法是,将GeBr 2插入相应的芳基溴化物的碳溴键中,通过醇解将芳基三溴锗烷转化为三乙氧基衍生物,以及将其与三乙醇胺的反烷氧基化反应生成三甲基乙酰胺。或通过卤代苯与GeCl 4的缩合反应在铜粉存在下进行醇解和环化。通过X射线衍射法研究了化合物I – IV的晶体结构。芳基香豆素(2.212–2.230Å)中的分子内供体-受体键Ge←N比相应的呋喃基和噻吩基香豆素中的长。将取代基引入苯环的o-位可将NGeC角值从177.5降低至144.2°。进行了量子化学计算以研究分离分子中的结构I – IV。