The reactions between equimolecular amounts of 4-bromophenylboronic acid and di-tert-butylsilanediol or tert-butylsilanetriol in toluene solutions at reflux temperatures afforded the borosilicate ring compound [(4-BrC6H4B)O2Si(t-Bu)2]2 (1), and the cube-based species [(t-BuSi)4(4-BrC6H4B)4O10] (2), in medium (62%) and low (13%) yields, respectively. These compounds were characterised by microanalysis, IR and NMR (1H, 11B, 13C and 29Si) spectroscopy and single crystal X-ray crystallography. During the work-up of 2, a sample of the boroxine, [(4-BrC6H4BO)3] (3), was isolated and was characterised by single crystal diffraction.
在甲苯溶液中,4-溴苯硼酸和二-叔丁基硅醇或叔丁基硅醇的等量反应在回流温度下生成了硼硅酸盐环化合物[(4-BrC6H4B)O2Si(t-Bu)2]2 (1),以及基于立方体结构的物种[(t-BuSi)4(4-BrC6H4B)4O10] (2),分别以中等(62%)和低(13%)产率获得。这些化合物通过微量分析、红外和核磁共振(1H、11B、13C和29Si)光谱以及单晶X射线衍射进行表征。在对2进行处理时,分离出了硼氧環[(4-BrC6H4BO)3] (3) 的样品,并通过单晶衍射进行表征。