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- Title
Crystal Structure of 3-Amino-5-Acetyl-4,7-Dihydro-6-Methyl-4-(2-Nitrophenyl)-2-Cyanothieno[2,3-b]-Pyridine and Specific Features of Its Molecular Packing in Crystal.
- Authors
Lysov, A. E.; Nesterov, V. N.; Potekhin, K. A.; Struchkov, Yu. T.
- Abstract
The molecular and crystal structures of 3-amino-5-acetyl-4,7-dihydro-6-methyl-4-(2-nitrophenyl)-2-cyanothieno[2,3-b]-pyridine is determined by X-ray diffraction. The unit-cell parameters are as follows: a = 14.68(1) Å, b = 8.704(5) Å, c = 25.36(1) Å, V = 3241(6) Å[sup 3] ,d[sub calcd] = 1.453g/cm[sup 3] ,Z = 8(1,1), and space group Pna2[sub 1]. The o-nitrophenyl substituent is synperiplanar relative to the hydrogen atom at the C(4) atom of the heterocycle. Two crystallographically independent reference molecules A and B in the structure can be considered a pair of the enantiomers related by an approximate noncrystallographic center of inversion. The degree of approximation of this pseudocenter is discussed. It is shown that the structure can be described as a combination of two systems of translationally equal layers. The pseudosymmetry of the crystal structure and the possibility of forming a similar molecular packing with a higher crystallographic symmetry are considered. © 2000 MAIK “Nauka / Interperiodica”.
- Subjects
ORGANIC compounds; CRYSTALS; CRYSTALLOGRAPHY
- Publication
Crystallography Reports, 2000, Vol 45, Issue 1, p91
- ISSN
1063-7745
- Publication type
Article
- DOI
10.1134/1.171142