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Camphor. It is well known that camphor has spec. rot. [«] D i5o+43° 

 (10 p. c. solution in methyl alcohol). Instead of proceeding with the 

 temperature precisely at 15°, it is practicable, according to R. Massy 1 ), 

 to work at ordinary temperature with a 10 p. c. solution in a 2-dm-tube 

 and to convert the rotation ? t thus read off into the rotation at 15° = 

 et — 0,035 (t — 15). With i < 15 the correction-factor becomes positive. 



A. Faucon 1 ) has determined the influence of concentration and of 

 temperature upon the specific rotation of camphor in carbon tetrachloride 

 solution. 



With a view of determining the density of camphor, H. Malosse *) has 

 prepared ^-percentage solutions (p = \Q to 60) in 90 and 99 p. c. alcohol, 

 acetone, methyl alcohol, benzene, ethyl acetate, olive oil, dimethyl aniline, 

 acetic acid, and carbon tetrachloride and has estimated the density at 20° 

 (compared with water at 4°). By transferring the values of p to the 

 abscissa and those of d^ to the ordinata, density curves are obtained 

 which, when carried out to ^> = 100, cross the ordinates placed at 100 at 

 about 0,963, from which the density of 100 p. c. camphor is calculated 

 as d^ = 0,963. This value deviates considerably from that which has 

 previously been ascertained for Z-camphor (di 8 o 0,9853). 



Epicamphor. A simple method of preparing epicamphor (/^-camphor), 

 a body of which we reported the discovery in our Report of October 1911, 

 p. 148, is described by ). Bredt and W. H. Perkin 1 ). The start from methyl 

 bornylene carboxylate, which they convert, by the action of hydroxylamine 

 hydrochloride and sodium methoxylate, into bornylene hydroxamic acid 

 CioH 15 -C(OH):N-OH (m.p. 136°, m. p. of the acetyl compound H 2°). This 

 hydroxamic acid, when heated, yields epicamphor and ammonia. The 

 sodium salt of the hydroxamic acid, when treated with toluene _p-sulphonyl- 

 chloride yields a syrupy mass. By treatment with of hydrochloric acid this 

 syrup, when distilled with steam, yields 60 p. c. of epicamphor, m.p. 184 

 to 185°: [«] D — 58,24°, m. p. of the oxime 103°, of the semicarbazone 238°. 

 When epicamphor is heated with bromine it gives rise to bromoepicamphor, 

 m. p. 134°; [«] D — 69,3°. Reduction of epicamphor with sodium and alcohol 

 ^results in epiborneol (/?-borneol) (m.p. 182 to 183°) which is identified by 

 its urethane, m. p. 82°. Possibly the epiborneol is not present in the pure 

 state, but consists of a mixture of epiborneol and epiisoborneol. By acting 

 upon epicamphor with sodamide and isoamyl nitrite a mixture results of 



x ) Bull. Soc. Pharm. Bordeaux 1911, 450. Quoted from Zeitschr. d. allg. oesterr. Apotheker 

 Ver. 66 (1912), 328. 



2 ) Compt. rend. 154 (1912), 652. 



3 ) Compt. rend. 154 (1912), 1697. 



*) Proceed, chem. Soc. 28 (1912), 56. 



