N-(1-Acryloyl-2,2,6,6-tetra-methyl-piperidin-4-yl)acryl-amide.
The title compound, C(15)H(24)N(2)O(2), crystallizes with two unique mol-ecules, (I) and (II), in the asymmetric unit, differing in the orientation of the acryloyl units with respect to the piperidine rings. The acryl-amide units are essentially planar in both mol-ecules (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 acryl-amide and acryloyl planes are inclined at 68.7 (4)° and 59.8 (3)° in the two mol-ecules. The piperidine rings each adopt twist boat conformations. In the crystal, strong N-H⋯O hydrogen bonds link the mol-ecules into zigzag C(4) chains along b. Additional C-H⋯O contacts result in the formation of stacks along a.
Department of Chemistry, University of Otago, PO Box 56, Dunedin,  New Zealand.
Shailesh K
SK
Goswami
Lyall R
LR
Hanton
C John
CJ
McAdam
Stephen C
SC
Moratti
Jim
J
Simpson