— 191 — 



Oxides. 



Cineol. According to C. Casanova 1 ), when iodine is allowed to react 

 under heat upon cineol, terpine hydrate or terpineol, the first result is oxidation 

 and the generation of hydriodic acid. The last-named body then reacts, 

 iodine being substituted. The ultimate product of the reaction from terpine 

 hydrate and cineol is di iodomenthane, and from terpineol, mono iodo- 

 menthene. 



The paper does not show whether, and to what extent, these bodies 

 have been analysed and identified by the author. 



On the formation of hydroxycineolglucuronic acid, see p. 157. 



Nitrogenous bodies. 



As stated on p. 185, fenchonitrile combines exceptionally readily with 

 nitrosylchloride, a faculty which is only possessed by unsaturated hydro- 

 carbons where [the double bond is in a definite position, and by certain 

 unsaturated oxygenated compounds. And as «-fencholenic acid no longer 

 shows any tendency to yield a clearly identifiable nitrosochloride, the 

 conclusion would be warranted, according to Wallach 2 ) that in the unsatu- 

 rated complex the cyano-group is able to influence positively the capacity of 

 absorption of an ethylenic bond into nitrosylchloride. As a matter of fact 

 menthonitrile yielded a nitrosochloride, m. p. 96 to 97° (from methylalcohol); 

 citronellalnitrile another, m. p. 106° (m. p. of the nitrolpiperidine 88 to 

 90°). Camphonitrile, pulegenic acid nitrile and /2-fencholenic acid nitrile 

 did not yield any solid products, but Wallach regards it as scarcely open 

 to doubt that if the nitriles of unsaturated acids were systematically explored, 

 many would be found to give nitrosochlorides. 



On the occurrence of hydrocyanic acid, see p. 167. 



On the occurrence of hydrocyanic acid in Prunus splicer ocarpa, Sw., 

 see p. 97. 



On the volumetric determination of hydrocyanic acid see p. 153. 



Skatol. Many years ago Emil Fischer 3 ) prepared skatol synthetically 

 by reacting with propionic aldehyde phenylhydrazone upon an equal quantity 

 of chloride of zinc. Recently A. E. Arbusoff and W. M. Tichwinsky 4 ) have 

 obtained the base in a similar manner by heating propionic aldehyde 



*) Bull. Chim. Farm. 49 (1910), 957. Quoted from Chem. Zentralbl. 1911, I. 731. 



2 ) Liebigs Annalen 379 (1911), 226. 



3 ) Berl. Berichte 19 (1886), 1566. 

 *) IUdem 43 (1910), 2301. 



