114 
MR. C. SCHORLEMMER ON THE NORMAL PARAFFINS. 
contained but small quantities of the hydrocarbon boiling at 30°; by long-continued 
and carefully conducted fractional distillation I succeeded in obtaining about 800 cub. 
centims. of pure pentane, boiling constantly at 37° to 39°, the boiling-point of which was 
not altered by further distillations. 
The mixture of pentyl chloride obtained by the method described above boiled 
between 95° and 110°, the principal fraction distilling at 100° to 102°. On decomposing 
these chlorides with potassium acetate, a mixture of pentene boiling at 39° to 40°, and 
of the acetic ethers boiling at 135° to 145°, was formed. The latter were converted into 
the alcohols, which by fractional distillation could be separated into two portions, one 
boiling at 120° to 122°, and the other at 134° to 137°. The products of oxidation of 
C H 3 
c 3 h 7 
rianic or pentylic acid. 
Methyl-propyl ketone is a colourless liquid boiling at 102° to 105°, having the 
same boiling-point as the ketone obtained by the distillation of a mixture of calcium 
acetate and butyrate, and that formed by oxidation of isoamylic alcohol. It combines 
with the bisulphites of the alkali-metals, and yields by further oxidation acetic and 
propionic acids. The aqueous distillate containing these acids was neutralized with 
sodium carbonate, the solution evaporated, and from the residue the acids liberated 
by successive distillations with insufficient quantities of sulphuric acid in four fractions, 
from which, by boiling with silver carbonate, the silver salts were prepared, which were 
analyzed. 
the alcohols were found to consist of methyl-propyl ketone , 
jcO, and normal vale- 
Calculated for silver propionate 59 ’67 per cent. 
First fraction, small, white needles, 
Second fraction was lost. 
Third fraction, indistinct needles, 
Fourth fraction, shining flat needles, 
Calculated for silver acetate 
0*335 gave 0T99 Ag=59*6 per cent. 
0*481 gave 0*307 Ag= 63*69 per cent. 
0*2095 gave 0*135 Ag=64*5 per cent. 
64*67 per cent. 
The acid derived from the primary pentyl alcohol contained small quantities of acetic 
and propionic acids, which were easily removed by distillation. The pure acid boils at 
184° to 187°, and smells very much like common butyric acid ; these are the properties 
of normal valerianic acid *, or, as it might conveniently be called, pentylic acid. 
The following salts were prepared and analyzed : — 
Silver pentylate, C 5 H 9 0 2 Ag, is a white precipitate, which crystallizes from a boiling 
solution in woolly needles. 
0*834 dried at 100° gave 0*4304 Ag. 
Calculated for C 6 H 9 0 o Ag. Found. 
51*67 per cent. 51*6 per cent. 
Barium pentylate, (C 5 H 9 0 2 ) 2 Ba + H 2 O, obtained by neutralizing the aqueous 
* Ann. Chem. Pharm. vol. clix. p. 58. 
