3. Other Methods of Preparation
1,3,5-Trinitrobenzene can be prepared by heating m-dinitrobenzene with nitric acid and sulfuric acid to 120'0;[1] by heating 2,4,6-trinitrotoluene with fuming nitric acid in a sealed tube at 180'0 for three hours;[2] by heating 2,4,6-trinitrobenzoic acid or its sodium salt with water, alcohol, dilute sodium carbonate or other suitable solvent.[3]
[1] Ber. 9, 402 (1876); Ann. 215, 344 (1882).
[2] Ber. 16, 1596 (1883).
[3] D. R. P. 77,353; Frdl. 4, 34 (1894).
XXV
2, 4, 6-TRINITROBENZOIC ACID
C6H2(NO2)3CH3 + 3O(Na2Cr2O7 + H2SO4)—> C6H2(NO2)3CO2H + H2O
Prepared by H. T. CLARKE and W. W. HARTMAN. Checked by J. B. CONANT and J. J. TOOHY.
1. Procedure