A Manual of the Chemistry of the Carbon Compounds

2U THB CHEMISTRY OF
Ethene-lactic acid must be regarded as the first oxidation-product
of primary propene alcohol, but it has not yet been obtained from
this compound. It is a monobasic aeid, as well as a primary alcohol,
whilst common or ethidme-ladio and is a secondary alcohoL
On oxidizing the former with dilute chromio acid, it is converted
into bibasio mtlvnic aeid, whilst common lactic acid is resolved by
oxidation into acetic acid and formic acid (or carbon dioxide and
water) •.—
CO.OH CO.OH
(1) CH,. + O2 O2 = CCH8
+H2O
CH^OH CO.OH
CO.OH
| CO.OH
(2) CH.OH CH.( + O2 = I + CO8 +
CH,
Malovdo Aeid O.H4Ot.—-This acid was first obtained by the oxidation
of malio acid;—
CO.OH
I CO.OH
OH.OH |
| +Oa=GH2 +CO2+K2O
CHa
|
I CO.OH
CO.OH
It is also formed by the oxidation of ethene-laotic aoid and by
heating cyanacetic acid with potash solution:—
ON CO.OH
CH8 8 + 2HjO ^ = CHj + NH3
CO.OH CO. O.OH
Malonic acid ctysttdlizes in large thin plates, melting at 132°. On
heating it stronger, it decomposes into carbon dioxide and aoetio aoid.
The malonates of the alkali-metals are readily soluble in water, those
of the other metals sparingly soluble, or insoluble.