Acta Crystallographica Section C

Crystal Structure Communications

Volume 59, Part 12 (December 2003)

Acta Cryst. (2003). C59, o715-o718 [doi:10.1107/S0108270103021310]

2-Phenylmalonpiperadide and 2-phenylmalonmorpholide

D. E. Lynch, G. E. Spicer and I. McClenaghan

Abstract: The structures of 2-phenylmalonpiperadide [systematic name: 2-phenyl-1,3-bis(piperidin-1-yl)propane-1,3-dione, C₁₉H₂₆N₂O₂, (I)] and 2-phenylmalonmorpholide [systematic name: 1,3-dimorpholino-2-phenylpropane-1,3-dione, C₁₇H₂₂N₂O₄, (II)], have been determined and both their molecular conformations and packing arrangements compared. Although chemically similar, compounds (I) and (II) exhibit different molecular conformations. The only general conformational similarities are that their respective carbonyl groups are orientated in the same direction and the heterocyclic rings exist in the chair arrangement. General similarities in the packing arrangements arise due to both compounds having the same space group (P2₁2₁2₁) and a similar alignment of their phenyl-substituted backbone with respect to the c axis. Similar C-HO hydrogen-bonding associations are listed for the carbonyl O atoms, while only one of the morpholine O atoms is involved in any such association.

Formula: C₁₉H₂₆N₂O₂ and C₁₇H₂₂N₂O₄

Online 30 November 2003


	Structure factor file (CIF format) (107.1 kbytes) Contains datablock I

	Structure factor file (CIF format) (100.0 kbytes) Contains datablock morph

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