A Manual of the Chemistry of the Carbon Compounds

THE CARBON COMPOUNDS. 265
lidc N-j ON, 6
or allyl cyanamidc N-( ON, a powerful base, which is soluble in
I (HtJ
water and possesses a very bitter taste.
Diattyl Carbamide m- Sinapolinc COJJJHCH 8 * 8 produced,
together with, carbon dioxide and lead sulphide, by heating oil of
mustard with water and lead oxide:—
N | gf* + 2PbO + H4O - CO { 55§5» + PUS, + CO2
It is soluble in water and crystallizes in shining scales, having an
alkaline reaction.
ACIDS OP THE SERIES CBHjn_jO,.
Allyl alcohol is a primary alcohol; on oxidation it yields acraldehyde
C3H4O and acrylic add C8H4OS. Acrylic acid is the first
member of a homologous series of acids, of which the corresponding
alcohols are not known. Tha following table contains the acids of
this group which are best studied:—
Acrylic Acid , , C3H4 O4 Cimicic Acid . CuHMOa
Crotonio „ . . C4H0 Oa Hypogrcic „ . C^HO
Angelic „ . . C6H8O2 Oleic „ .
Pyroterebic Acid. CaHi0Og Erucic „ .
Some of these acids exist as glycerides in fata, and others have
been prepared artificially by different reactions. A series of acids
which are isomeric with those contained in the table have been
obtained from oxalic aoid. By acting on ethyl oxalate with the zinc
compounds of alcohol radicals we obtain ethyl-ethers of the so-called
isolactic acids, and by treating the latter with phosphorus trichloride
they lose water aud are converted into ethers of the acids of the iso~
ji li i i,
Thua the ethyl-ether of oxy-iaobutyric or diniethylox&lio acid
yields the ethyl-ether of methncrylic acid, which is isomeric with
crotonic acid:—
GH8 CHS
CH3 CH2
3 C.OH +rCl, = 3 C +PO31I3 + 3HC1