"passing over iberibed 90 and 110°, 
of constant boiling points were obtained: — ra alah ; 
Citronellal | in pics, os ‘Citronellal 
ee / B.p.:203, to” 2040", MOB Vig: 198 to 200° 
Pig. Oe diso 0.8880 Me PES Gere a a 
4 fe Npuo 1.46141 Mpyo 1.45482 
iy Ne M, 47.68 ~ Mg 47.09 peters Fe | 
é Semicarbazone, m. p. 85 to 86° Semicarbazone, m. P. 825 to 
Ma calculated 47.92. ae 
Both pironellals yield quantitatively a Sere ec eone which is ‘easily . 
chloroform, but nearly insoluble in cold low-boiling light petroleum. The ser 
of citronellal J is ie and crystallizes at ordinary temperature ayes pai 
a piers of the active and the racemic semicarbazones. By repeated recrysta 
the racemic product is obtained in the end. yy 
The semioxamazones are formed on heating the both ingredients i in 5 
0 
alia, in toluene and amylalcohol as colloids and form gels on cooling from al ot 
they crystallize well on slow cooling. 
(@-citronellal, or ‘citronellal : sensu strictior), for citronellal II the formula i 1 (eymmetric 
citronellal, or rhodinal). eRe ont ia 
Whe are of opinion that Prins had not to deal with pure cittonellars? sp 
gravity and refraction being far too high make it most probable that he had. to 
products either strongly contaminated with isopulegol or highly resinified. ‘The cor 
off on cooling down to — 290 in form of eae melee at 84 to 
nawor oe eae a _body of the m. P. 60 to yee The eon ay 
| - ~ “| 
