A method of alkylation and acylation of trinitrobenzene employing the oxidation of anionic σ-complexes generated from organosilicon reagents in the presence of KF/18-crown-6 ether is described. The method enables the introduction of alkyl and acyl substituents (R = O, CH2COEt, CH2COOMe(Et), COMe, COPh, CH2Ph, CH2=CHCH2 (All), CCPh) into 1,3,5-trinitrobenzene, 1,3,5-Tris(trifluoromethylsulfonyl)benzene