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NITRO DERIVATIVES OF BENZENE 237

m-Dinitrobenzene reacts with a 20% solution of sodium hydroxide only when
boiled. One of its nitro groups is reduced and 3,3’-dinitroazoxybenzene is formed

(Klinger and Pitschke [14]):

When in alcoholic solution, a molecule of m- dinitrobenzene adds a molecule

of sodium ethoxyde to form an addition product with the formula C 6 H 4 (NO 2 ) 2.

.C 2 H 5 ONa (Giua [15]).

m- Dinitrobenzene reacts with potassium cyanide in methyl (or ethyl) alcohol

solution, methoxynitrobenzonitrile being formed (de Bruyn [16], 1904) :

Ortho- and p- dinitrobenzene react with sodium sulphite to

spending nitrosulphonic acids:

form the corre-

(2)

(3)

According to Golosenko (after Orlova [3]), m- dinitrobenzene reacts with sodium

sulphite at 70°C according to the scheme:

(4a)