A Manual of the Chemistry of the Carbon Compounds

362 TEE CHEMISTRY OF
2CeH6.CO.OHa + POClj - 2C6H6.CQC1 4- NaOl + NaPO8
C6H5.CO.ONa + C6HS.COC1 = j^CO } °
+ NaC1
The mass is exhausted with water, and the residue crystallized
from alcohol. Benzoyl oxide forms rhombic prisms, melting at 42°,
and boiling at 310°. By boiling water, it is slowly resolved into two
molecules of benzole acid.
JBeimyl-acetyl Oxide Q^'QQ \ 0 is produced by acting with acetyl
ehlorido on sodium benzoate, or with benzoyl chloride on fused
sodium acetate. It is a colourless, oily liquid, which by distillation
is resolved into acetyl oxide and benzoyl oxide:—
Benzoyl Dioxide rj'S'*fiQ*o f •—To prepare this compound, benzoyl
chloride is mixed with pure barium dioxide, and the resulting mass
exhausted with carbon disulphide or ether. It forms colourless
crystals, does not dissolve in water, and is decomposed by heat with
a slight detonation. Hot potash-solution resolves it into benzole acid
and oxygen.
Benzamide C6H6,CO.NH3 is produced by acting with ammonia on
benzoyl chloride or ethyl benzoate. It is sparingly soluble in cold
water, and crystallizes from a hot solution in needles, melting at 115°,
and boiling at 288°, On heating it -with phosphorus pentoxide, it is
resolved into water and benzonitrile.
Hipp/uric or Benmcmidaeetic Add CflH9NO3 occurs as potassium or
tiodium salt in the urine of all herbivorous animals, and also in small
quantity in human urine. When toluene, benzoic acid, oil of bitter
almonds, or cinnamic add, are taken internally, they are converted
into hippuric acid, which is found in the urine. This transformation
takes place in the human organism, as well as that of many animals,
Quinic acid is also converted into hippuric acid, but only in the
human system and that of graminivorous animals.
Hippuric acid is also produced by the action of benzoyl chloride
on the silver or zinc salts of amidacetic acid, and by heating benzamide
with chloracetic acid ;—
CH2C1
CO.OH