4-(N-Methylnitramino)pyridine 1-oxide

Abstract

In the title compound, C 6 H 7 N 3 O 3 , the NNO 2 group is twisted ca 59° from the planar pyridine ring. The nitramino group is almost planar, with the N7 atom diverging 0.15 A from the C4-N8-C11 plane. The lone pair on N7 is included into the N-nitro group π-electron system resulting in two independent sets of multicenter π-orbitals. Significant anisotropy of the temperature dependence of thermal expansion is observed in the range 90-300 K.