Silanole. I. Stabilit�t und Kondensationsverhalten von Organosilandiolen
摘要:
AbstractEs wurden folgende Organosilandiole dargestellt: und jeweils bei 180° kondensiert. An Hand von laufenden Untersuchungen des Gewichtsverlustes, des Molekulargewichtes, des OH‐Gruppen‐Gehaltes und der Viskosität wurden Unterschiede im Kondensationsverhalten festgestellt und bindungstheoretisch diskutiert.
Silylenes 2 or 4, generated by thermolysis of cyclotrisilanes 1 and 3, were inserted into the SiCl or SiH bonds of monosilanes to yield a variety of disilanes, which can be further functionalized subsequently. In a few cases, trisilanes are accessible by the reaction of 1 with disilanes. The reaction of a metalated silane with a chlorosilane is an alternative method for the formation of SiSi bonds
Synthesis and Characterization of New Aromatic-Group Substituted Silanes Bearing Tris (Trimethylsilyl)Methyl Bulky Groups
作者:Abbas Tarassoli、Ashrafolmolouk Asadi
DOI:10.1080/10426500903074866
日期:2010.6.30
Reaction of the Grignard reagent, p-ClC6H4MgCl, with SiCl4 in toluene gave (p-ClC6H4)2SiCl2, which was treated with KHF2 to give (p-ClC6H4)2SiF2 (1). Reaction of the latter with [(Me3Si)3C]Li in THF leads to the preparation of [(Me3Si)3C](p-ClC6H4)2SiF (2). Treatment of (2) with LiAlH4 gave [(Me3Si)3C](p-ClC6H4)2SiH (3) and [(Me3Si)3C](p-ClC6H4)(C6H5)SiH (4). [(Me3Si)3C](p-ClC6H4)SiCl2 (5) was also
A catalyst composition consisting essentially of a non-linear polymer consisting essentially of a recurring unit having the following structural formula: (R.sup.2).sub.2 P--R.sup.1 --Si--O.sub.3/2 wherein R.sup.1 is an unsubstituted or substituted straight or branched chain divalent saturated alkylene radical having 1 to 10 carbon atoms or an unsubstituted or substituted divalent aryl radical having 1 to 3 benzene rings wherein the substituents for the alkylene radical can be halogen or a phenyl radical and the substituents for the aryl radical can be halogen or straight or branched chain saturated alkyl radicals having 1 to 5 carbon atoms; and R.sup.2 is an unsubstituted or substituted straight or branched chain or cyclic monovalent saturated alkyl radical having 1 to 10 carbon atoms or an unsubstituted or substituted monovalent aryl radical having 1 to 3 benzene rings wherein the substituents for the alkyl radical can be halogen or a phenyl radical and the substituents for the aryl radical can be halogen or straight or branched chain saturated alkyl radicals having 1 to 5 carbon atoms; and Wherein each phosphorous atom in the polymer is coordinated with a platinum or palladium metal atom having a zero or positive charge, each positively charged metal atom having a sufficient number of negatively charged organic or inorganic radicals, devoid of functional groups, attached thereto to satisfy the valence of said transition metal atom, and wherein the radicals are selected from the group consisting of halogens; nitrates; sulfates; straight chain alkoxy or acyloxy radicals having 1 to 10 carbon atoms; and aryloxy radicals having 1 to 3 benzene rings.
Nickel-Catalyzed Reductive [4 + 1] Sila-Cycloaddition of 1,3-Dienes with Dichlorosilanes
作者:Liangliang Qi、Qiu-Quan Pan、Xiao-Xue Wei、Xiaobo Pang、Zitong Liu、Xing-Zhong Shu
DOI:10.1021/jacs.3c04209
日期:2023.6.21
selection of well-defined sila-synthons. Herein, we demonstrate the potential of chlorosilanes, which are industrial feedstock chemicals, for this type of reaction under reductive nickel catalysis. This work extends the scope of reductive coupling from carbocycle to silacarbocycle synthesis and from single C–Si bond formation to sila-cycloaddition reactions. The reaction proceeds under mild conditions