Kristallstruktur des Lithium‐Trimethylsilanolats [Li₇(OSiMe₃)₇(THF)]

Abstract

The lithium silanolate LiOSiMe3 is accessible from the reaction of Me3SiOSiMe3 with LiMe in tetrahydrofuran. Single crystals of [Li7(OSiMe3)7(THF)] were obtained from toluene at 25 °C. The structure of [Li7(OSiMe3)7(THF)] (C2/c) features a capped trigonal antiprismatic arrangement of seven Li atoms. The Li atoms in [Li7(OSiMe3)7(THF)] are μ3‐bridged by seven O atoms of the silanolate ligand.

From the Selective Cleavage of the Si‐O‐Si Bond in Disiloxanes to Zwitterionic, Water‐Stable Zinc Silanolates

“…[1,2] In the course of discussions of sustainability and environmental protection, the demand for a mild and easy cleavage of the Si-O-Si unit in siloxanes has arisen, particularly in the context of recycling widely used silicones. [6] As molecular siloxane compounds containing an R 3 Si-O-MX n unit (M = main-group/transition metal, X = variable) are known to be readily hydrolyzed by water to form the corresponding silanols or disiloxanes, [7][8][9] they have not been considered relevant under aqueous conditions. [3] In contrast, molecular metallasilanolates have gained increasing attention in various fields of modern chemistry, [4,5] such as for the preparation of structurally modified silica surfaces (artificial surface design) and as new inorganic materials for homogeneous catalysis reactions.…”

Modern concepts and methods in the chemistry of polyhedral metallasiloxanes

“…36, 106 [151]), water and THF molecules ( Fig. 36; 107 [152]), 108 [153], 109 [154]), or triflate ions (Fig. 36, 110 [154]).…”

An approach to creating novel anions: silylated triel compounds with –CH2– and –O– linkers, [InCl2{O(HO)Si(t-Bu)2}]2and Li[B(CH2SiMe3)4]

“…In the course of our long-standing studies of silanolate (siloxide) ligands (Kern et al, 2008;Kü ckmann et al, 2007;Lerner, 2005;Lerner et al, 2002Lerner et al, , 2005, we have found a convenient preparation route for the silanediol (t-Bu) 2 Si-(OH) 2 . Therefore, it was obvious to introduce (t-Bu) 2 Si(OH) 2 as a chelating ligand to prepare the corresponding indium siloxide complexes.…”