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Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.003 Å; R factor = 0.044; wR factor = 0.133; data-to-parameter ratio = 17.8. organic compounds o4388 # 2007 International Union of Crystallography

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.002 Å; R factor = 0.044; wR factor = 0.145; data-to-parameter ratio = 21.9.

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Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.003 Å; R factor = 0.033; wR factor = 0.089; data-to-parameter ratio = 13.6.In the title compound, C 9 H 14 N 2 O 3 , the morpholine ring adopts the usual chair conformation. The pyrrolidine-2,5-dione ring adopts an extremely flattened envelope conformation. The crystal structure is stabilized by weak C-HÁ Á ÁO interactions. Related literatureFor related literature, see: Allen (2002); Allen et al. Experimental Crystal data C 9 H 14 N 2 O 3 M r = 198.22 Monoclinic, P2 1 =n a = 6.1368 (2) Å b = 7.8038 (3) Å c = 20.9032 (8) Å = 98.202 (2) V = 990.82 (6) Å 3 Z = 4 Mo K radiation = 0.10 mm À1 T = 293 (2) K 0.26 Â 0.18 Â 0.18 mm Data collection Bruker Kappa-APEX2 diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2004) T min = 0.974, T max = 0.982 8190 measured reflections 1726 independent reflections 1184 reflections with I > 2(I) R int = 0.026