after, had a eee higher optical rotation than the pe he ( 
and Haller’), in contrast to which it was solid too. The possibility of isome sm 
however, not excluded. : 
thionyl enicuide: | rae 
Gs CH. Cl C:CH:-R . 7 i a 
CHC 6g + MgRX = Cec a, 0 + MgX Cl. 
The transposition, generally only a by-reaction with halogenated ketones, becomes h 
the chief reaction. The authors thus prepared methyl-, ethyl-,, propyl, isobutyl-, pheny! 
benzyl-, phenylethyl-, phenylpropyl-, cyclohexyl- and a-naphthylmethylenecamphor. 2 
The following facts are looked upon by the authors as proofs of that these bodies have — 
the constitution of derivatives of methylenecamphor: — The compounds prepared with 
magnesium phenyl and. cyclohexyl bromides are perfectly identical with the benzylidene- 
and hexahydrobenzylidenecamphors obtained before in another way. An aliphatic and 
an aromatic derivative, on being-split up by means of ozone, yielded camphoric acid and 
ample quantities of the camphorquinone to be expected according to the suggested 
formula. In one case, the other component (isovaleric acid) was easily detected, whereas 
phenylacetic acid, which ought to have formed on ozonation of the benzyl derivative, 
was present only in an extremely small quantity, because under the ee chosen — 
by the authors it was almost completely burnt by the ozone. _ 
On refractrometric investigation of the liquid substances of the methylenecanenam 
group, a fairly considerable difference resulted, it is true, in the molecular exaltations 
of the aliphatic and aromatic compounds, but on the other hand the ae cx 7 
C:CH:Cl 
In order to prepare Rem hde Scope d Cs Bie A molecule of dd 
thermic to the extent of — 118 cal. for the formation of 5.22 g. of the stores Jeu 
C:CH 
In order to prepare De eee ee fethylident ea ie ¢ oO 
