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Crystal structure of cyclic dehydroaminoacid derivatives

I. Tetrasubstituted (Z)-5(4H)-oxazolones
Published/Copyright: August 25, 2010
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Zeitschrift für Kristallographie
From the journal Zeitschrift für Kristallographie Volume 189 Issue 1-2

Abstract

The crystal and molecular structures of two 5(4H)-oxazolones related to α,β-unsaturated amino acids have been determined from three-dimensional X-ray data.

C12H11NO2(1a) is orthorhombic, space group Pbca, Z = 8, a = 7.629(2) Å, b = 14.944(3) Å, c = 17.802(3) Å.

C17H13NO2(1b) is monoclinic, space group P21/n, Z = 8, a = 19.176(3) Å, b = 7.578(2) Å, c = 18.703(3) Å, β = 94.98(5)°.

The investigation of this series of “Z” 5(4H)-oxazolones having tetra-substituted exocyclic double bond provides, by comparison with studies of analogous systems, information on the conformational flexibility of α,β-unsaturated amino acid derivatives. The main peculiarity is the presence of an accepting nitrogen atom instead of an NH group. This allows fully planar conformations, at least to compounds having trisubstituted (“Z” or “E”) exocyclic double bond systems. The 1H-NMR spectra are also discussed.

Published Online: 2010-08-25
Published in Print: 1989

Articles in the same Issue

  1. Structural investigation of two synthetic warwickites: Undistorted orthorhombic MgScOBO3 and distorted monoclinic Mg0.76Mn1.24OBO3
  2. A redetermination of the crystal structure of cupric chloride dihydrate
  3. Crystal data and crystal structure for silver cyclohexaphosphate monohydrate: Ag6P6O18 · H2O
  4. On the microstructure of a rapidly quenched Mn4Si alloy
  5. Structural investigation of two synthetic oxyborates: The mixed magnesium-manganese and the pure cobalt ludwigites, Mg1.93(2)Mn1.07(2)O2BO3 and Co3O2BO3
  6. Crystal chemistry of natural Mn3+-bearing calderite-andradite garnets from Otjosondu, SWA/Namibia
  7. The crystal structure of bis(sulfonylophenylo)diiodomethane, C13H10I2O4S2
  8. Crystal structure of cyclic dehydroaminoacid derivatives
  9. Structure of BaCuInF7: The interpretation between a pyrochlore-like edge-sharing network of octahedra and a defect fluorite structure
  10. The crystal structure of 5-hydroxy-7-methoxyflavanone
  11. Die Physik der nichtkristallinen Stoffe dargestellt durch Mikroparakristalle
  12. Comments on the valence rule by Nesper and von Schnering
  13. The crystal and molecular structure of 9,10-dimethylphenanthrene
  14. The crystal structure of Zr2P
  15. The crystal structure of Cu(II)-bis[1-(2-pyridinyl)-2-propanonato-N,O]
  16. A comparative study of the crystal structures of Ba(ClO3)2, Ba(BrO3)2 II, Pb(ClO3)2, and Sr(ClO3)2
  17. Crystal structure of guanidinium nitroprusside, [CN3H6]2[Fe(CN)5NO], and barium nitroprusside trihydrate, Ba[Fe(CN)5NO] · 3H2O
  18. Crystal structure refinement of Zr7P4
  19. Kristallzüchtung
  20. Classical Tessellations and Three-Manifolds
  21. Festkörperphysik. Eine Einführung in die Grundlagen
  22. Reliability in Non-Destructive Testing
  23. Alumina Extraction from Non Bauxitic Materials
  24. Crystallographic Computing 4. Techniques and New Technologies
https://doi.org/10.1524/zkri.1989.189.1-2.65

Articles in the same Issue

  1. Structural investigation of two synthetic warwickites: Undistorted orthorhombic MgScOBO3 and distorted monoclinic Mg0.76Mn1.24OBO3
  2. A redetermination of the crystal structure of cupric chloride dihydrate
  3. Crystal data and crystal structure for silver cyclohexaphosphate monohydrate: Ag6P6O18 · H2O
  4. On the microstructure of a rapidly quenched Mn4Si alloy
  5. Structural investigation of two synthetic oxyborates: The mixed magnesium-manganese and the pure cobalt ludwigites, Mg1.93(2)Mn1.07(2)O2BO3 and Co3O2BO3
  6. Crystal chemistry of natural Mn3+-bearing calderite-andradite garnets from Otjosondu, SWA/Namibia
  7. The crystal structure of bis(sulfonylophenylo)diiodomethane, C13H10I2O4S2
  8. Crystal structure of cyclic dehydroaminoacid derivatives
  9. Structure of BaCuInF7: The interpretation between a pyrochlore-like edge-sharing network of octahedra and a defect fluorite structure
  10. The crystal structure of 5-hydroxy-7-methoxyflavanone
  11. Die Physik der nichtkristallinen Stoffe dargestellt durch Mikroparakristalle
  12. Comments on the valence rule by Nesper and von Schnering
  13. The crystal and molecular structure of 9,10-dimethylphenanthrene
  14. The crystal structure of Zr2P
  15. The crystal structure of Cu(II)-bis[1-(2-pyridinyl)-2-propanonato-N,O]
  16. A comparative study of the crystal structures of Ba(ClO3)2, Ba(BrO3)2 II, Pb(ClO3)2, and Sr(ClO3)2
  17. Crystal structure of guanidinium nitroprusside, [CN3H6]2[Fe(CN)5NO], and barium nitroprusside trihydrate, Ba[Fe(CN)5NO] · 3H2O
  18. Crystal structure refinement of Zr7P4
  19. Kristallzüchtung
  20. Classical Tessellations and Three-Manifolds
  21. Festkörperphysik. Eine Einführung in die Grundlagen
  22. Reliability in Non-Destructive Testing
  23. Alumina Extraction from Non Bauxitic Materials
  24. Crystallographic Computing 4. Techniques and New Technologies
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