Mol­ecular and crystal structure of (1R,3R,4S,7R)-3-bromo-7-(bromo­meth­yl)-1,7-di­methyl-3-nitro­bi­cyclo­[2.2.1]heptan-2-one

The bicyclic title compound, C₁₀H₁₃Br₂NO₃, is a camphor derivative, crystallizing in the Sohncke space group P2₁2₁2₁, and the absolute configurations of its four chiral C atoms were unambiguously determined. The relative configuration of a bridgehead carbon atom was also confirmed by one- and two-dimensional NMR experiments. In the extended structure, weak C—H⋯O, C—H⋯Br and halogen bonds of the type Br⋯O consolidate the packing.