112 — 



settled, as the views of Wagner, Semmler and Kondakow on the 

 course of the reaction have not been strictly proved, and contradict 

 each other. 



In distilling the xanthogenic acid ester of Wallach's pino- 



campheol 1 ) according to the usual method, A. Tschugaeff and 



A. Esche 2 ) observed between 180 and 190 a very energetic 



decomposition. The reaction took place according to the following 



equation: 



C 10 H 17 O • CS • SCH, = C 10 H 16 + COS + CH 3 SH. 



The hydrocarbon formed, after distillation in a current of vapour, 

 shaking with potash liquor, and purification over sodium, was found 

 to be pure pinene of the boiling point 155 to 156 . The melting 

 point of its nitrosochloride was found at 103 . 



Camphene. According to K. S 1 a w i n s k i ' s 3 ) examinations 

 camphene combines with hypochlorous acid, with formation of the 

 following products: 



1. Camphene glycol chlorhydrin 



(C H 3 ) 2 == C — - C H C H, 



CH„C1 — COH 



CH 2 



I 



CH 



•CH, 



2. The chloride C 10 H 16 C1 2 of the melting point 139 to 140 , 



(CH 3 ) 2 



CH 9 C1 — CC1- 



-CH- 

 I 



CH 2 

 I 

 CH 



CH 



CH 



3. A mixture of three isomeric monochlorides C 10 H 15 C1, which 

 consists of camphene monochloride, cyclene monochloride, and an 

 unknown chloride. 



From his examination the author draws the conclusion that the 

 structure of isoborneol and camphene is the same. 



Phellandrene. J. Kondakow and J. Schindelmeiser 4 ) have 

 attempted to produce phellandrene synthetically from carvomenthene. 



*) Liebig's Annalen 300 (1898), 288. Report October 1898, 54. 



2 ) Accord, to Chem. Ztg. 29 (1905), 1 189. 



3 ) Bull. Intern. Acad. Cracovie 7 (1905), 491. Ace. to Chem. Ztg. Repert. 29 

 (1905), 378. 



4 ) Journ. f. prakt. Chemie II. 72 (1905), 193. 



