Carbon dioxide metals

Alkali and alkaline earth metals, Carbon dioxide, carbon tetrachloride, or other chlorinated... 

Metals, Sodium peroxide See Sodium peroxide Metals, Carbon dioxide... 

Alkali and alkaline earth metals, Carbon dioxide, carbon tetrachloride, and other chlorinated hydrocarbons. (Also prohibit eg. sodium, magnesium, calcium, potassium, water, foam and dry chemical on fires involving these metals—dry sand should powdered aluminum. be available). 

Platinum is very slowly attacked by hot concentrated sulphuric acid, particularly at about 250° to 280° C.,s but the introduction of sulphur dioxide into the liquid, by addition of a piece of sulphur or carbon, completely prevents the solution of the metal. Carbon dioxide and nitrogen are without influence, but arsenious and antimonious oxides exert a marked protective effect upon the metal. It is suggested that in the case of the pure acid, dissociation of sulphur trioxide into dioxide and oxygen takes place, the last named attacking the platinum. The sulphur dioxide, when added from an external source, owes its protective influence to the fact that it represses the dissociation, whilst the arsenious and antimonious oxides act by absorbing the oxygen.6... 

Quantum mechanical calculations on the conformational properties of norepinephrine have also been reported. Interconversion of ephedrine and pseudo-ephedrine to a slight extent under y-irradiation has been observed. Absorption of carbon dioxide by cupric ephedrinates can be accounted for by carbamate formation rather than formation of metal-carbon dioxide bonds. -Acylation of /3-phenethylamines by protected amino-acids, e.g. N-CBZ-leucine, has been reported. ... 

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