1-Nitroindoline.
In the title compound, C(8)H(8)N(2)O(2), the nitramino group is planar and only slightly twisted with respect to the indoline rings. The bridgehead N--C bond is slightly shorter than in typical secondary aromatic nitramines. The N--N bond has some double-bond character. The molecules are connected by weak C--H...O hydrogen bonds, forming chains parallel to the z direction.
Institute of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland. zaleski@uni.opole.pl
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