Analytical Methods for Organic Cyano Groups by M. R. F. Ashworth

By M. R. F. Ashworth

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A n d Y A S H I N S K I I , V . G . , Zh. Anal. Khim. (1954). 3. CRITCHFIELD, F . E . , F U N K , G . L . , a n d JOHNSON, J . B . , Anal 9 , 162 Chem. 28, 7 6 (1956). 4 . TERENT'EV, A . P . , B U Z L A N O V A , M . M . , a n d OBTEMPERANSKAYA, S . I . , Zh. Anal. Khim. 14, 506 (1959). 5. TERENT'EV, A . P . , B U Z L A N O V A , M . M . , OBTEMPERANSKAYA, S . I . , a n d V O L O D ' Z K O , V . , Vestn Mosk. , Ser. Khim. 83 (1962); Chem. Abs. 5 6 , 2 8 5 0 (1962); Zbl. 13, 1698 (1964). 6. BELCHER, R .

A n d MINIERI, P . P . , / . Am. Chem. Soc. 7 0 , 4 0 4 5 (1948). 64. F E I G L , F . , G O L D S T E I N , D . , a n d LIBERGOTT, E . , Chemist-Analyst 55. 56. 57. 58. 59. 60. 61. 62. 5 3 , 37 ( 1 9 6 4 ) . 65. HESS, W . C , Proc. Soc. Exptl. Biol. Med. 3 3 , 106 (1935). 66. SOLOWAY, S. a n d LIPSCHITZ, A . , Anal. Chem. 24, 898 (1952). 67. V E N N , I . , Diplomarbeit, U n i v e r s i t y of t h e S a a r , S a a r b r i i c k e n (1968). 68. ROBERTSON, E . B . , SYKES, B . D . , a n d D U N F O R D , H .

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.

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