REACTIONS AND IDENTIFICATION
i. Oxidation to benzole add.
Boil a mixture of i ml. of benzyl
chloride, 50 ml. of saturated aqueous KMnO
solution and 2 g. of
under reflux for 30 minutes. Acidify with cone.
HCl and then add 25% Na
solution until the brown precipitate
has dissolved. On cooling, benzoic acid crystallises out.
Filter through a small Buchner funnel, wash with water and identify
(p. 347). When recrystallised from water, benzoic acid has m.p. 121°.
Benzene, toluene, naphthalene, anthracene, phenanthrene, biphenyl,
, toluene, C
, and petrol
(a mixture of aliphatic hydrocarbons,
colourless liquids, insoluble in and lighter than water. Benzene and
toluene, which have similar odours, are not readily distinguishable
chemically, and their physical constants should therefore be carefully