RESUMO
The syntheses and crystal structures of the two title compounds, C11H10O3 (I) and C17H14BrNO2 (II), both containing the bi-cyclo-[2.2.2]octene ring system, are reported here [the structure of I has been reported previously: White & Goh (2014 â¸). Private Communication (refcode HOKRIK). CCDC, Cambridge, England]. The bond lengths and angles of the bi-cyclo-[2.2.2]octene ring system are similar for both structures. The imide functional group of II features carbonyl C=O bond lengths of 1.209â (2) and 1.210â (2)â Å, with C-N bond lengths of 1.393â (2) and 1.397â (2)â Å. The five-membered imide ring is nearly planar, and it is positioned exo relative to the alkene bridgehead carbon atoms of the bi-cyclo-[2.2.2]octene ring system. Non-covalent inter-actions present in the crystal structure of II include a number of C-Hâ¯O inter-actions. The extended structure of II also features C-Hâ¯O hydrogen bonds as well as C-Hâ¯π and lone pair-π inter-actions, which combine together to create supra-molecular sheets.