Physical Gliemistry of Essential Oils. 



ir>3 



Thk System i.-pinene— cineol. 



Mol. p.c. 

 Wt. p.c. 



Found 

 Wt. p.c, 

 Mol. p.c. 



Found 

 Wt. p.c. 



Found 

 Wt. p.c. 

 Mol. p.c. 



The System d-pinene — cineol. 



Wt. p.c. 

 Mol. p.c. 



Found 

 Wt. p.c. 



Found 

 Wt. p.c. 



Found 

 Wt. p.c. 

 Mol. p.c. 



Found 

 Calc. 



fl-pineiie. 

 10ft 

 100 



29.510 



Concentration d-pinene- 

 A, B. C. 



82.84 64.18 46.85 



84.54 66.98 49.95 



21.220 

 21.04O 



Rotation- 

 16.560 

 16.300 



12.07O 

 11.90O 



Refractive Index- 



1.4630 

 1.4630 



1.4618 

 1.4620 



1.4609 

 1.4609 



Density — 



.8807 .8915 



.8825 .8931 



.8805 .8913 



Specific Rotary Power — 

 24.390 18.800 13.54o 

 24.450 18.940 13.83o 



.8700 

 .8709 

 .8699 



30.12 

 32.80 



7.780 

 7.650 



1.4598 

 1.4597 



.9019 

 .9034 

 .9018 



8.620 

 8.890 



E. 

 17.91 

 19.81 



4.600 

 4.550 



1.4586 

 1.4588 



.9095 

 .9110 



5.06O 

 5.290 



cineol. 

 

 



1.4579 



.9220 



Tlie Si/stem Cineol-Cifral. 



Here one of the constituents of the mixture has an open chain. 

 Unfortunately, the refractivities lie too close together for differ- 

 ences to be detected, and both substances are inactive. 



The densities show fair agreement when calculated from molar 

 tractions, but apparently other factors are introduced by th'e 

 wider structural differences. 



The citral was from Merck's, and was characterised as follows — 

 8,5= .8900 

 /^,,= 1.4780 



