نتایج جستجو برای: silanolate

تعداد نتایج: 39  

2012
Michael Hay Richard Staples Andre Lee

In the title salt, (C(16)H(36)N)[Fe(C(3)H(9)OSi)(4)], the cation contains a central N atom bonded to four n-butyl alkyl groups in a tetra-hedral arrangement, while the anion contains a central Fe(III) atom tetra-hedrally coordinated by four trimethyl-silanolate ligands.

2002
C. J. BRINKER

The hydrolysis and condensation reactions of monomeric alkoxysilanes and organylalkoxysilanes utilized in sol-gel processing are reviewed. Both reactions occur by acid or base-catalyzed bimolecular displacement reactions. The acid-catalyzed mechanisms are preceded by protonation of OH or OR substituents attached to Si, whereas under basic conditions hydroxyl or silanolate anions attack Si direc...

Journal: :Journal of the American Chemical Society 2008

2012
Hwi Hyun Lee Min Jeong Go Ka Hyun Park Youngjo Kim Junseong Lee

The binuclear title complex, [Zn(2)(C(22)H(28)N(3)O)(2)(C(3)H(9)OSi)(2)], has a crystallographic imposed centre of symmetry. The Zn(II) atom is coordinated by three O and one N atom from one 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentyl-phenolate ligand and two bridging trimethyl-silanolate anions in a distorted tetra-hedral geometry. The dihedral angle between the benzotriazole ring system and t...

2015
Caiwei Geng Xiang Hao Peng Jiao

In the title compound, [Mo(C6H18NSi2)(C3H9OSi)2N], the Mo(VI) cation is located on a mirror plane and is coordinated by a nitride anion, a 1,1,1-trimethyl-N-(tri-methyl-sil-yl)silanaminate anion and two tri-methyl-silanolate anions in a distorted tetra-hedral geometry; the N atom and two Si atoms of the 1,1,1-trimethyl-N-(tri-methyl-sil-yl)silanaminato anionic ligand are also located on the mir...

2012
Marjolein van der Kaaden Eefjan Breukink Roland J Pieters

Derivatives of an antifungal agent that targets the β-(1,3)-D-glucan synthase, papulacandin D, were synthesized and tested for activity. The papulacandin D structure contains a challenging benzannulated spiroketal unit, which is introduced in a palladium-catalyzed cross-coupling reaction of a glycal silanolate and an aryl iodide followed by an oxidative spiroketalization. Four different variant...

Journal: :Chemistry: A European Journal 2021

The tris(pentafluoroethyl)silanol, Si(C2F5)3OH, flashes out of the shadows silanol derivatives in cover image, paving way to its disiloxane and disilanolate. Oxidation tris(pentafluoroethyl)silane, Si(C2F5)3H, with NO2 provides which readily condenses (C2F5)3SiOSi(C2F5)3. Deprotonation situ generated Si(C2F5)3OH yields disilanolate [{Si(C2F5)3O}2]2− underlining formally Lewis amphoteric charact...

Journal: :Angewandte Chemie 2021

We report the first total synthesis of samroiyotmycin A (1), a C2-symmetric 20-membered anti-malarial macrodiolide isolated from Streptomyces sp. The convergent synthetic strategy orchestrates bisalkyne fragment-assembly using an unprecedented Schöllkopf-type condensation on substituted β-lactone and ambitious late-stage one-pot alkyne cross metathesis–ring-closing metathesis (ACM–RCAM) reactio...

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