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In its principal application, it adds across carbon-oxygen double bonds, for example in an aldehyde, to form a new carbon-carbon bond: [2] RCH=O + (CH 3) 3 SiC≡N → N≡C– CHR–O Si(CH 3) 3. The product is an O-silylated cyanohydrin. One use of this reagent is to convert pyridine-N-oxides into 2-cyanopyridine.
A trimethylsilyl group (abbreviated TMS) is a functional group in organic chemistry.This group consists of three methyl groups bonded to a silicon atom [−Si(CH 3) 3], which is in turn bonded to the rest of a molecule.
Transportation management systems manage four key processes of transportation management: Planning and decision making – TMS will define the most efficient transport schemes, according to the given parameters, which have a lower or higher importance of various factors according to the user policy: transport cost, shorter lead-time, fewer stops possible to ensure quality, flow's regrouping ...
Tricaine mesylate (Tricaine methanesulfonate, TMS, MS-222, Syncaine, Tricaine-S,), is white powder used for anesthesia, sedation, or euthanasia of fish. TMS is the only anesthetic licensed in the United States for fin fish that are intended for human consumption.
TMS is a contaminant in the atmospheres of spacecraft, where it arises from the degradation of silicone-based materials. [5] Specifically, it is the volatile product from the hydrolysis of polydimethylsiloxane, which are generally terminated with trimethylsilyl groups: (CH 3) 3 SiO[Si(CH 3) 2 O] n R + H 2 O → (CH 3) 3 SiOH + HO[Si(CH 3) 2 O] n R
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TMSOTf is quite sensitive toward hydrolysis: (CH 3) 3 SiO 3 SCF 3 + H 2 O → (CH 3) 3 SiOH + HO 3 SCF 3. It is far more electrophilic than trimethylsilyl chloride.. Related to its tendency to hydrolyze, TMSOTf is effective for silylation of alcohols: [2]
Its advantages are that it is commercially available as a solid and it is soluble not only in ethers, such as THF or diethyl ether, but also in aromatic solvents, like benzene and toluene by virtue of the lipophilic TMS groups.