TWO PINNATE LEAF BORONIAS AND THEIR ESSENTIAL OILS. 



207 



6/9/20, Narrabeen.— On distillation 85% distilled at 76- 

 80° O. at 10 mm. This fraction had :— 



Specific gravity at 20° C. ... ... 0*910 



Optical rotation ... ... ... +11*98° 



Refractive index, 18° 1*4520 



It readily gave the Schiff reaction, and yielded a semi- 

 carbazone, sparingly soluble in alcohol, of melting point 

 176-177° O. 



The tribromide was also prepared which melted at 122 

 - 123° C. after recrystallisation from ethyl acetate. 



27/9/20, Bundanoon. — 40 ccs. were distilled at 767 mm., 

 viz: — 



First drops at 184° C. 



Specific 

 gravity 15° C. 



Optical 

 Rotation. 



Refractive 

 Index, 20° C. 



184-191° O. 



2 ccs. 



... 



-43*20° 



1*4571 



191-199 „ 



18 „ 



0*9078 



-47*20 



1-4555 



199-210 „ 



13 „ 



0*9182 



-41*75 



1*4545 



210-218 „ 



4 „ 



0*9203 



-33*10 



1-4598 



Residue „ 



2 „ 









The two main fractions were mixed and on redistillation 

 the greater portion of it boiled at 75 - 77° O. at 10 mm., 

 aud had : — 



Specific gravity at 15° O. 

 Optical rotation 

 Refractive index, 20° O. 



0*9128 

 - 47*65° 

 1-4534 



As the foregoing distillations showed the oil to consist 

 mainly of thujone, the oil prepared from Bundanoon 

 material 16/2/21, was used for the preparation of the ketone 

 in a pure condition. 40 ccs. lots of the oil were, therefore, 

 mixed with 150 ccs. 35% solution sodium bisulphite, 150 

 ccs. alcohol, and 24 ccs. water, and allowed to stand for 

 several months until combination was complete. The 



