3-Azabicyclo[3.3.1]nonane-2,4-dione: CSP2001 structure prediction test case No. 1

Features of the structure of the title compound, C8H11NO2, are the near planar arrangement of the dicarboximide fragment and the C atoms alpha to it and the molecular noncrystallographic C-s mirror symmetry. N-H . . .O hydrogen bonds link the molecules to form zigzag chains propagated in the a direction and sheets parallel to (001) are formed by replication of the chains by cell translation in the b direction. The sheets, related to one another by the operation of crystallographic centres of symmetry, are stacked in the c direction.