All the interatomic distances in the title compound, C 22 H 25 N 3 O 4 , are normal. The heteroatom ring of the quinoxalinone system shows a half-chair conformation, slightly distorted towards a sofa. In the crystal structure, the molecules dimerize via a pair of N-HÁ Á ÁO hydrogen bonds. The dimers
4-(2-Benzylaminoacetyl)-1,2,3,4-tetrahydroquinoxalin-2-one
✍ Scribed by Kruszynski, Rafal ;Trzesowska, Agata ;Czestkowski, Wojciech ;Bartczak, Tadeusz J. ;Mikiciuk-Olasik, Elżbieta
- Publisher
- International Union of Crystallography
- Year
- 2006
- Tongue
- English
- Weight
- 285 KB
- Volume
- 62
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
All interatomic distances of the title compound, C 17 H 17 N 3 O 2 , are normal. The phenyl ring of the benzylaminomethyl substituent is disordered over two positions. The heteroatom ring of the quinoxolinone system shows a half-chair conformation. The molecules are held together by intermolecular N-HÁ Á ÁO hydrogen bonds resulting in a chain along the crystallographic c axis. The chains are linked via weak intermolecular C-HÁ Á ÁO and C-HÁ Á ÁN hydrogen bonds into a three-dimensional hydrogen-bonded network.
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The heterocycle of the quinoxalinone system exhibits a half-chair conformation. The value of the total puckering amplitude Q T is 0.391 (5) A Ê . The benzylaminomethyl part of the side branch is close to planar. This weighted-least-squares plane makes a dihedral angle of 67.45 ( 14) with the quinoxa
In the title compound, C~28~H~22~BrN~3~O~5~S·0.5C~4~H~10~O, the tetrahydropyrazine ring adopts a distorted half-chair conformation. The bromobenzaldehyde substituent has an axial orientation, while the 4-nitrophenyl group is in an equatorial position. The benzene rings of these substituents are not
Single-crystal X-ray study T = 295 K Mean '(C±C) = 0.004 A Ê R factor = 0.047 wR factor = 0.145 Data-to-parameter ratio = 12.9 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
The title compound, C~26~H~26~N~2~O~7~, is a thiamidine derivative. Geometric parameters are in the usual ranges. The crystal packing is stabilized by a classical N—H...O hydrogen bond, several weak C—H...O hydrogen bonds and a π–π stacking interaction.