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In the molecule of the title compound, C 18 H 32 N 2 O 4 , the central bicyclo­[3.3.0]octane (octa­hydro­penta­lene) has a rigid ring junction. Both rings of the bicyclo­[3.3.0]octane unit adopt an envelope conformation, and the flexible  tert -butyl­carbamoyl side chains each have an extended conformation. Such a constrained bicyclo­[3.3.0]octane aliphatic template is of inter­est with respect to the design of novel self-assembling motifs. Mol­ecules related by  c -glide symmetry are linked  via  inter­molecular N—H⋯O hydrogen bonds, forming a two-dimensional layer structure. Neighboring layers are weakly associated along the  a  axis due to the close approach of the  tert -butyl­carbamoyl groups (2.55 Å).

Di-tert-butylN,N′-(octahydropentalene-2,5-diyl)dicarbamate