— 140 — 



"di*o 1,4755. No hydrogen had been added to the linalyl radical. The 

 pyruvic ester of the new alcohol boiled at 135° (6 mm.) and yielded a 

 semicarbazone melting at 103°. An attempt to prepare the aldehyde 

 corresponding to the alcohol was unsuccessful. 



The odour of all the bodies mentioned above was much weaker than 

 that of linalool or geraniol, hence the enlarging of the molecule of these 

 alcohols is attended by a diminution in the degree of intensity of the odour. 



When the hydrobromic ester was condensed with sodium aceto- 

 acetate, the result was a ketonic ester, for which structure Vmay be assumed. 

 When saponified with alcoholic potash liquor the ketonic ester gave off 

 carbonic acid, a ketone (VI) being formed. The hydrazone of this ketone 

 boiled at 125° (6 mm.); the semicarbazone had m. p. 86°. 



When the ketone is oxidised with permanganate of potassium and 

 chromic acid it most probably yields levulic acid; before the structure 

 of the group CioH i7 can be discussed it is necessary to await the result 

 of further investigations. 



/COOC2H5 /COOH 



I C 10 H i7 CH< II C 10 H ir CH< 



x COOC 2 H 5 x COOH 



Substituted malonic dimethylester. Acid. 



Ill C 10 H 17 CH 2 COOH IV C 10 H 17 CH 2 CH 2 OH 



Substituted acetic acid. Alcohol. 



V C 10 H ir CH-COOC 2 H5 VI C 10 H 17 -CH 2 -COCH 3 



Ketone. 



COCH3 



Ketonic ester. 



On /?-geraniol-r/-glucoside see p. 139. 

 On isogeraniol see p. 145. 



Linalool. We have lately noticed that the specific gravity of linalool 

 prepared by us from essential oils was frequently lower than we had 

 for a long time been used to observe, either in the commercial article, or 

 in linalool isolated from various kinds of essential oils. A sample of such 

 a linalool, which has been examined by us, gave the following constants : 

 b.p. 199 to 200°, diso 0,8664, « D — 17° 30', n D20O 1,46288, mol.refr.found49,17, 

 calc. as C10 His 0/^48,97. Estimation of the linalool by 6 hours boiling 

 with acetic anhydride 1 ) in xylene solution gave an alcohol-content of 93%; 

 in toluene solution the alcohol absorbed the calculated quantity of sodium 

 without any solid matter being separated from it. 



In spite of repeated careful fractionation we were unable to observe 

 any greater variations in density, rotatory power or refractive index; hence 



*) Report April 1907, 120. 



