Physics and Chemistry. 115 
1 io 
i at wives ol a iodid. On re this with moist silver o oxyd, 
aia, age (tertiary pseudo-butyl alcohol) was obtaine d 
ts very core: 4 ase properties. The reaction which takes 
hoe is as follow 
, OHI : site cH, 
fae. aaa” | TS; pele a Eis ee 
a F phape eer mS Se 
H,€H, ©€H,€H, HCH: €H,€H, 
cee ; Isobutylene. Isobutylene. patyl iba a. 
jie ioe believes we these facts sustain his general law of 
the formation of unsaturated compounds; a law which for the 
homo soln of ethylene ny thus be formulated en water 
Wh 
és remov rom an alcohol-molecule, that carbon-atom which 
is directly united with the carbon-atom holding the hydroxyl, 
Surnish the hydrogen. A similar law holds the case of the 
haloid apy ae of. wee mponalonnic alcohols, When combination 
pla unsymmetrically 
of Diane (for example ly propglen €H. 3tHe cH 2) and water (or 
an haloid acid), the which these latter bodies are 
separated, are divided between the two carbon-atoms so that the 
hydroxyl (or the corresponding halogen), is united to the least 
yt aesioo, seer nen in the compound.—Zeitschr. ime 2 Me 
vi, 29, Dec., 
15. On the "Syntheses of Aromatic Acids.—Starting ie ‘the 
bg known facts that a monobasic acid may be viewed as 
drocarbon in which an atom of hydrogen is replaced by carboxyl 
(Soot), and further, that, in general, the basicity of acids 
Went s upon the number of carboxyl groups hihi they contain, 
URTZ proposes to make practical use of them in synthesis. By 
g one or more such replacements 7 a hyd ood, either 
orocar -amalgam, — any desired aromatic 
acid may be produced, Tn this way, for example, Wurtz prepa 
benzoic acid ; 90 grams monobromo-benzol (phenyl bromid € ak 
Br) being heated with 60 grams ethyl chlorocarbonate (COO 
(€, HCl) and 3°5 5 Kile s sodium-amalgam containii 
taming on 
per cent of sodium. aecn proceeded slowly, requiring 
many days for completion, een at 110°C. Carbonic and carbon 
ous gases were evoly sometimes mixed with a gas which burned 
a green flame, > prohebly my chlorid, When the fluid had 
re 
