— 182 — 



Juniperol. H. Ramsay 1 ) reports on crystals of the sesquiterpene 

 alcohol juniperol, C 15 H 24 0, obtained from juniper bark (?) by distil- 

 lation with steam. The alcohol (m. p. 107 ; d 1,0116; insoluble in 

 water) was isolated from the fraction of the oil boiling between 130 

 to 1 55° (8 mm. press.) and occurred in thick, optically inactive, tricli- 

 nous tables. Crystallographic examination gave the following results: 

 0,7243:1:0,7574, a = 90° 14', /?=io3°3o', y = go°5 f . 



Aldehydes. 



It is well known that many constituents of essential oils give ad- 

 ditive products with acids. With the exception of a few of the most 

 familiar, such as the combinations of cineol with hydro bromic acid 

 and phosphoric acid and cinnamic aldehyde with nitric acid, these 

 bodies have so far been very little explored. In this connection an 

 article by A. Shukoff and F. Kassatkin 2 ) is interesting, inasmuch as 

 it describes a series of combinations of aldehydes and ketones 

 with acids. For instance, when camphor is introduced into an- 

 hydrous nitric acid under cooling (both bodies in equi - molecular 

 quantities) there is formed a viscous mass, which congeals in long 

 needles when cooled and liquifies when exposed to air. This mass has 

 the formula C 10 H 16 O • HN0 3 ; it melts at 24 and is readily soluble 

 in the usual organic solvents. Solutions of camphor and nitric acid 

 in petroleumether produce a compound (C 10 H 16 O) 2 HN0 3 , m.p. 2,2°. 

 When equimolecular quantities of camphor and phosphoric acid are 

 heated the result is a body C 10 H 16 O • H 3 P0 4 , which occurs as a 

 liquid, solidifying in large crystals with m. p. 29 . When hydriodic 

 acid gas is introduced into a solution of camphor and petroleum ether, 

 the compound C 10 H 16 O«HI is formed. This is a reddish - brown 

 crystalline mass, m. p. 29 to 30 03 ) and sparingly soluble. The intro- 

 duction of hydrochloric acid gas into powdered camphor yields a 

 colourless, mobile liquid additive product, which decomposes when 

 exposed to air. This body congeals into a solid mass (m. p. 4,2°) 

 when cooled. In the same manner nitrous acid anhydride and 

 camphor yield a liquid body which does not congeal even at — 3 5 . 



The product of a combination from benzophenone and nitric 

 acid, C 6 H 5 • CO • C 6 H 5 • HN0 3 is also described. This is a readily 

 congealing liquid which, when recrystallised from ether, melts at 39 . It 

 is further stated that benzaldehyde with nitric acid yields a cristalline 



*) Zeitschr. f. Kristallogr. 46 (1909), 281; through Chem. Zentralbl. 1909, 

 I. 1656. 



2 ) Journ. russ. phys.-chem. Ges. 41 (1909), 157. Through Chem. Zentralbl. 

 1909, I. 1761. 



3 ) Berl. Berichte 6 (1873), 936. 



