N-(1-Acryloyl-2,2,6,6-tetra­methyl­piperidin-4-yl)acryl­amide

The title compound, C(15)H(24)N(2)O(2), crystallizes with two unique mol­ecules, (I) and (II), in the asymmetric unit, differing in the orientation of the acryloyl units with respect to the piperidine rings. The acryl­amide units are essentially planar in both mol­ecules (r.m.s. deviations = 0.042 and 0.024 Å, respectively), as are the C(3)N chains of the acryloyl units. The carbonyl O atoms of the acryloyl systems lie significantly out of these planes, viz. by −0.171 (9) Å for molecule (I) and by 0.33 (1) Å for molecule (II). The acryl­amide and acryloyl planes are inclined at 68.7 (4)° and 59.8 (3)° in the two mol­ecules. The piperidine rings each adopt twist boat conformations. In the crystal, strong N—H⋯O hydrogen bonds link the mol­ecules into zigzag C(4) chains along b. Additional C—H⋯O contacts result in the formation of stacks along a.