Tschugaeff

Tschugaeff prepared thujene by distilling thujyl xanthcgenate." This body had the following characters —... 

By the dry distillation of trimethyl - thujylammonium hydroxide, Tschugaeff obtained a thujene quite similar to the above, but of considerably higher optical rotation. He therefore considers that two stereoisomers may result from different methods of preparation from thujone. 

Upon thermolysis of xanthates (xanthogenates) 1 olefins 2 can be obtained, together with gaseous carbon oxysulfide COS 3 and a thiol RSH 4. This decomposition process is called the Chugaev reaction, another common transcription for the name of its discoverer is Tschugaeff. 

Scheffer, Proc. Akad Amsterdam, 18. 446, 1910 L. Tschugaeff and W. Chlopin, Zeit. anorg, Ohem., 86. 154, 1914. 

Soon after the introduction of dimethylglyoxime as a specific reagent for nickel by Tschugaeff-Kraut-Brunck (1905-1907), Baudisch discovered a compound which precipitates copper and iron quantitatively from acid solutions.82 He appropriately named this reagent as cupferron . It is the water soluble ammonium salt of nitrosophenylhydroxylamine (5). When dissolved in chloroform, the whitish-grey copper compound gives a bright yellow solution and the brown yellow iron(III) compound a deep red solution. This behaviour reveals the inner complex character of these derivatives (6). 

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