1-Adamantyl radicals react with 3,5-dinitro-1-X-benzenes (Ia–d), 2,4-dinitro-1-X-benzenes (IIa–e), and 2,4,6-trinitro-1-X-benzenes (IIIa–c) to effect selectively the displacement of the nitro group. This adamantyl-denitration represents a further example of the ease of radicalsubstitution at an ipso position. The same substrates react with phenyl and methyl radicals, but the reaction takes a completely