434 ODOitOGKAriiiA. 



acetic anhydride further resulted in the formation of the 

 acetate of an isomeric alcohol (CioHigO), to which the name 

 licarhodol was given. This product, having a strong odour of roses, 

 yielded upon oxidation the same aldehyde as licareol, C\o H^g O, 

 and is, according to Barbier's view, the stable, stereo-isomeric form 

 of licareol. According to Bouchardat,* licarhodol is identical with 

 geraniol, which he has prepared in a similar manner from the 

 linalool of the oil of Lavandula sjnca. The properties of licareol 

 and its derivatives leave no room for doubt that licareol is identical 

 with linalool, which occurs as an important constituent, not only in 

 lio-n-aloe oil, but also in lavender oil and bergamot oil. Barbier has 

 also investigated Coriander oil,t with the result that he has found 

 coriandrol to be simply the dextrogyre form of licareol, or, in other 

 words, dextrc-linalool, with a boiling point of 196^ to IDS'" and an 

 optical rotation of + 15^ 1'. By oxidation he obtained the alde- 

 hyde CioH^eO (licareol) and the acid CioHigO., (licarenic 

 acid) ; with chlorine water, the liquid chloride C\oHjgCl. 

 Dextro-limonene and the acetic ester of licarhodol were obtained 

 through the action of acetic anhydride. Coriandrol, therefore, 

 differs from licareol (linalool) only in its optical rotation. 



As regards lihodinol, Barbier finds :|: that this isomer of geraniol 

 stands in a similar relation to licareol, but it yields valerianic acid 

 by oxidation. The evidence regarding its constitution points, as 

 in the case of licareol, to the existence of two stereo-isomers, one 

 stable and the other the reverse, the unstable compound being 

 transformable into the first after heating with acetic anhydride. 

 Ehodinol submitted to this treatment formed only rhodinol-acetic 

 ether, a colourless, mol)ile liquid of agreeable odour, boiling at 131^. 

 On saponification, unaltered rhodinol was re-formed from this 

 ether. The alcohol appears, therefore, to constitute the stable 

 modification corresponding to an as yet unknown unstable one 

 capable of conversion into the former on treatment with acetic 

 anhydride. 



* Comptes Ptendus, cxvi., p. 1253. 

 t Comptes Kendus, cxvi., p. 1459. 

 X Comptes Ptendus, cxvii., p. 177. 



