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New 4-Pentafluorosulfanyl and 4-Perfluoroalkylthio Derivatives of 1-Chloro-2-nitro-and 1-Chloro-2,6-dinitrobenzenes. -Compounds (II) are obtained by fluorination of disulfides (I) with AgF2, while perfluoroalkylation is carried out by means of thermolytic reactions with Xe(II) bis(perfluoroalkylcarboxylates). The introduction of fluorine-containing substituents into the aromatic ring reinforces the activation of the halogen substituents towards nucleophilic attack. Several nucleophilic substitution reactions are carried out and by this way N-and S-containing groups are introduced into the benzene ring. -(SIPYAGIN, A. M.; ENSHOV, V. S.; KASHTANOV, S. A.; BATEMAN, C. P.; MULLEN, B. D.; TAN, Y.-T.; THRASHER*, J. S.; J. Fluorine Chem. 125 (2004) 9, 1305-1316; Dep. Chem., Univ. Ala., Tuscaloosa, AL 35487, USA; Eng.) -M. Paetzel 01-084