■ — IOI — 



after driving off the ether, should melt at 8o° (m. p. of vanillin). In 

 order to detect acetanilide, the residue is once more dissolved in 

 15 cc. of a 10 per cent, ammonia solution, and shaken with the 

 same volume ether. If the ether is driven off, and the weighed 

 residue subtracted from the first, the quantity of pure vanillin is ob- 

 tained. Any acetanilide found is added to the quantity already as- 

 certained above. 



Notes on recent research work concerning 

 terpenes and terpene derivatives. 



General. 



The researches of L. Balbiano 1 ) and his collaborators (already 

 repeatedly described by us) on the action of solutions of mercuric 

 acetate on terpenes and compounds with a propenyl-group , are now 

 supplemented by the authors as follows 2 ): The hexylene 3 ), C 6 H 12 , 

 of the constitution (CH 3 ) 2 C : CHCH 2 CH 3 , detected in American 

 petroleum, was identified by its oxidation products acetone and propi- 

 onic aldehyde. — Anethol glycol melts at 9 8°; the nature of 

 the yellow oil which the authors obtained in addition to this glycol 

 has not yet been determined with certainty. — With regard to the 

 oxidation of methyl chavicol, it may be added that the isomeric 

 chlorine compound C 10 H 13 O 2 HgCl apparently (?) melts at 91 ; of 

 the analogous bromine derivatives the one melts at 70 to 71 , and 

 is crystalline, the other is amorphous. Reduction of the two chlorine 

 derivatives with zinc and soda liquor yielded only methyl chavicol. — 

 The quantities of the isomerides C H 2 2 : C 6 H 3 • C 3 H 5 (O H.) • HgC 2 H 3 2 

 formed by the action of mercuric acetate on safrol, vary according 

 to 'the length of time of the action. Both again yield safrol when 

 distilled with phosphoric acid, or when decomposed with sulphuretted 

 hydrogen. The compounds C 10 H 11 O 3 N (m. p. 89 ) and C u H 13 3 N 3 

 (m. p. 1 5 8°), correspond to the oxime and the semicarbazone respectively 

 of isosafrol glycol. — The compound obtained on oxidation of methyl 

 isoeugenol (CH 3 0) 2 : C 6 H 3 • C 3 H 5 (OH) 2 , m. p. 120 to 12 1°, yields 

 in absolute benzene solution with phenyl isocyanate the corresponding 

 carbamic acid ester of the m. p. 166 to 168 , 



(CH 3 0) 2 :C 6 H 3 .CH[OC(:0).NH.C 6 H 5 ]CH[OC(:0)NH .C 6 H 5 ]CH 3 . 



x ) Berl. Berichte 35 (1902), 2994; Report April 1903, 83 and Berl. Berichte 

 36 (1903), 3575; Report April 1904, 100. 



*) Gazz. chim. ital. 36 (1906), I, 237, 251, 257, 264, 268, 276, 281, 286, 

 291, 301. Ace. Chem. Centralbl. 1906, II. 119 to 122; 126. 



3 ) Chem.-Ztg. 25 (1901), 932. 



