Carbon tetrachloride chemical stability

Once the radicals diffuse out of the solvent cage, reaction with monomer is the most probable reaction in bulk polymerizations, since monomers are the species most likely to be encountered. Reaction with polymer radicals or initiator molecules cannot be ruled out, but these are less important because of the lower concentration of the latter species. In the presence of solvent, reactions between the initiator radical and the solvent may effectively compete with polymer initiation. This depends very much on the specific chemicals involved. For example, carbon tetrachloride is quite reactive toward radicals because of the resonance stabilization of the solvent radical produced [1] ... 

Carbon tetrachloride is a solvent that is chemically inert, highly resistant to oxidation, but biologically toxic. Despite its chemical stability, P450 is able to convert carbon tetrachloride to several reactive species. Reduced P450 transfers an electron to chloride leading to the elimination of a chloride anion and the generation of the reactive trichloromethyl radical (10). Trichloromethyl radical can undergo a second one-electron reduction to... 

Unlike other [2.2]paracyclophanes (see below), 20a exhibits remarkable chemical stability. It is inert towards bromine in carbon tetrachloride, permanganate solution, and maleic anhydride, and cannot be reduced with Pd/C or nickel at room temperature under 1 atm hydrogen pressure. 

At elevated temperatures will decompose to carbon tetrachloride, sulfur chloride, and heavy oily polymers Ignition Temperature (deg. F) Not pertinent Electrical Hazard Not pertinent Burning Rale Not pertinent. Chemical Reactivity Reactivity with Water Reacts only when hot to give carbon dioxide, hydrochloric acid, and sulfur Reactivity with Common Materials Reacts with iron or steel, evolving carbon tetrachloride. Corrosive to most metals Stability During Transport Stable Neutralizing Agents for Acids and Caustics Flush with water, rinse with dilute sodium bicarbonate or lime solution Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

Dense and clear colorless to yellowish liquid with a pungent odor of chloroform. Quite chemically inert to most minerals. Miscible with ethanol, diethyl ether, acetone, benzene, and carbon tetrachloride. Decomposed when exposed to sunlight and it must be stored in brown inactinic glass bottle. It can be stabilized by adding 2-3 wt.% of ethanol. Solubility in water at 20°C 3.2 g/L. Prepared by electrolysis of sodium bromide and acetone or by reacting sodium hypobromite with acetone ". Highly toxic. 

A new preparation method is described to synthesize porous silicon carbide. It comprises the catalytic conversion of preformed activated carbon (extrudates or granulates) by reacting it with hydrogen and silicon tetrachloride. The influence of crucial convoaion parameters on support properties is discussed for the SiC synthesis in a ftxed bed and fluidized bed chemical vapour deposition reactor. The surface area of the obtained SiC ranges ftiom 30 to 80 m /g. The metal support interaction (MSI) and metal support stability (MSS) of Ni/SiC catalysts are compared with that of conventional catalyst supports by temperature programmed reduction. It is shown that a Ni/SiC catalyst shows a considnable Iowa- MSI than Ni/Si(>2- and Ni/Al203-catalysts. A substantially improved MSS is observed an easily reducible nickel species is retained on the SiC surface after calcination at 1273 K. 

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