Selective Si–O–Si Bond Cleavage as Synthetic Access to Functionalized, Hydrolysis-stable Zinc Silanolates
作者:Christian Däschlein、Carsten Strohmann
DOI:10.1515/znb-2009-11-1240
日期:2009.12.1
hydrolysis-stable, molecular zincsilanolates which were long time supposed to be unstable in the presence of water. Both, the selectivecleavage of the Si-O-Sibond as well as the formation of the molecular zincsilanolates are independent of the substituents at silicon, the used zinc(II) salt or the aminomethyl side arm. Detailed structural studies showed that zwitterionic interactions are the reason
在温和条件下选择性裂解官能化硅氧烷中强且反应性差的 Si-O-Si 键是现代合成化学的决定性任务。氨基甲基官能化二硅氧烷 1、6、(R,R)-7 和 8 ([R2(CH2NR')SiO]2,R =Me 或 Ph,NR'= NC5H10、NC5H8(CH3)2 或 NC4H7) 的简单处理(CH3)) 分别与溴化锌 (II) 和氯化锌 (II) 结合,导致形成高度水解稳定的分子硅烷醇锌,其在水存在下长时间不稳定。Si-O-Si 键的选择性断裂以及分子硅醇盐的形成均与硅、所用锌 (II) 盐或氨基甲基侧臂上的取代基无关。
Synthesis and molecular structure of a zwitterionic ZnI2 silanolate
作者:Jonathan O. Bauer、Carsten Strohmann
DOI:10.1016/j.ica.2017.09.001
日期:2018.1
A new representative of hydrolysis-stable zwitterionic ZnHal(2) silanolates (with Hal = I) was obtained by treatment of an aminomethyl-functionalised disiloxane with zinc(II) iodide. The molecular structure was elucidated by X-ray crystallography and NMR spectroscopy. (C) 2017 Elsevier B.V. All rights reserved.
From the Selective Cleavage of the Si-O-Si Bond in Disiloxanes to Zwitterionic, Water-Stable Zinc Silanolates
作者:Christian Däschlein、Jonathan O. Bauer、Carsten Strohmann
DOI:10.1002/anie.200902318
日期:2009.10.12
Zinc salts do SiO's: Organosilicon chemistry is crucially determined by the high stability and chemical resistance of the Si‐O‐Si bond. The formation and structural existence of water‐stable metallasilanolates demonstrate both the possibility to cleave the Si‐O‐Si bond with simple zinc compounds under mild conditions as well as the existence of such molecular metallasilanolates in the presence of