Silicon ethers

Allyl polyethylene glycol ethers Non ionic Used to produce surface active, water-soluble silicone ethers (antifoams) ... 

Apart from the metal atom aggregation reactions described below, bis(arene)metal complexes of the early transition metals are resistant to ligand displacement The rings on the corresponding bis(naphthalene)metal species (41) are by, contrast, labile. Polymer-supported analogs of these naphthalene compounds with vanadium and chromium are known (42), but Ti atoms attack the polymer at the silicon ether linkage. These and other hybrid polymers can be further modified once the metal atom is incorporated. Thus a-methyl naphthalene is displaced from the hybrid organometallic polymer shown in Scheme 7 (43). 

Acetals, Furans, Peroxides, Silicon Ethers, Phosphorus Ethers... 

The chemical shifts of groups bonded to the oxygen atom of the silicon ethers (siloxanes) are described with the other ether oxygen compounds. 

The HNMR spectra of the silicon ethers appear quite similar to those of the aliphatic ethers. The presence of the silicon nucleus can normally be detected only when a hydrocarbon group is bonded directly to it. The silicon ethers are readily soluble in carbon tetrachloride and deuterochloroform. 

CDs cannot be detected directly by gas chromatography (GC), except derived by dimethyl-silicon-ether beforehand. The analysis conditions are as follows Column 3% SXR covered with Chromosorb WAW DMCS (80/100 mesh) temperature program 325 C 05°C, 20°C/min Carrier gas (He) velocity 45-50 mL/min. It is crucial for accurate analysis to control the derivative process. 

Table 2 compares the rate of hydrolysis of several bulky silicon ethers with acid, base, and fluoride TBDMS ethers are less resistant to hydrolysis than the corresponding TIPS (triisopropylsilyl) and TBDPS (f-butyldiphenylsilyl) ethers. 

Chem. Descrip. Silicone ether sulfate Ionic Nature Anionic... 

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