By M. R. F. Ashworth
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Extra info for Analytical Methods for Organic Cyano Groups
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He replaced the sodium carbonate by sodium hydroxide, so that a stable colour was formed after 6 minutes and evaluated at 490 n m ; amounts of 0-1-1 jxg cyanoacetic acid could thus be estimated. (g) Reaction with Nitrosyl Chloride Perrot* * has prepared derivatives from compounds having the — C H 2 — C N group by treatment with nitrosyl chloride. 19). -toluenesulphonates as well. (h) Titration as Acids Compounds possessing active methylene groups may often be titrated as acids. Both Fritz and co-workers and Streuli have carried out such titrations in non-aqueous solution.