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Trimethylsilyl chloride, also known as chlorotrimethylsilane is an organosilicon compound (silyl halide), with the formula (CH 3) 3 SiCl, often abbreviated Me 3 SiCl or TMSCl. It is a colourless volatile liquid that is stable in the absence of water.
Trimethylsilanol is a weak acid with a pK a value of 11. [10] The acidity is comparable to that of orthosilicic acid, but much higher than the one of alcohols like tert-butanol (pK a 19 [10]).
Methyltrichlorosilane can be used to induce branching and cross-linking in PDMS molecules, while chlorotrimethylsilane serves to end backbone chains, limiting molecular weight. Other acid-forming species, especially acetate, can replace chlorine in silicone synthesis with little difference in the chemistry of the finished polymer. These ...
Chlorodimethylsilane, also called dimethylchlorosilane and abbreviated DMCS, is a chemical compound with the formula (CH 3) 2 SiHCl. It is a silane, with a silicon atom bonded to two methyl groups, a chlorine atom, and a hydrogen atom.
Triorganosilyl sources have quite variable prices, and the most economical is chlorotrimethylsilane (TMS-Cl), a Direct Process byproduct. The trimethylsilyl ethers are also extremely sensitive to acid hydrolysis (for example silica gel suffices as a proton donator) and are consequently rarely used nowadays as protecting groups.
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Organosilanols can be obtained by hydrolysis of organohalosilanes, such as chlorotrimethylsilane.They can also be prepared by the oxidation of organosilanes with oxidizing agents (R = organic residue):
Silanization is the attachment of an organosilyl group to some chemical species. Almost always, silanization is the conversion of a silanol-terminated surface to a alkylsiloxy-terminated surface.