On racemic and L-malates: a comparison of their crystal structures
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Michel Fleck
Abstract
The crystal structures of eight different L-malates have been determined and refined from single-crystal X-ray diffraction data. The compounds are the monoclinic (space group P21, Z = 2) L-malates Ca(C4H4O5)·3H2O (a = 6.652(1) Å, b = 8.378(1) Å, c = 8.268(1) Å, β = 112.65(2)°, R = 0.027), Ni(C4H4O5)·3H2O (a = 5.762(1) Å, b = 9.006(2) Å, c = 8.406(1) Å, β = 105.54(1)°, R = 0.024), CuH2(C4H4O5)2 (a = 9.911(1) Å, b = 5.271(1) Å, c = 11.510(1) Å, β = 109.33(1)°, R = 0.031), CsH(C4H4O5)·H2O (a = 7.439(1) Å, b = 7.481(1) Å, c = 7.852(1) Å, β = 116.67(1)°, R = 0.027) as well as the four isomorphic tetragonal (space group P41212, Z = 4) L-malates MgH2(C4H4O5)2·4H2O (a = 7.524(1) Å, c = 27.459(2) Å, R = 0.041), MnH2(C4H4O5)2·4H2O (a = 7.548(1) Å, c = 27.707(2) Å, R = 0.027), CoH2(C4H4O5)2·4H2O (a = 7.519(1) Å, c = 27.537(2) Å, R = 0.030) and ZnH2(C4H4O5)2·4H2O (a = 7.533(1) Å, c = 27.360(2) Å, R = 0.029). A comparison of the atomic arrangements of L-malates with their racemic counterparts shows different aspects of symmetry as well as differences in the connectivity of the building units.
In addition, for all the compounds, powder diffraction data were collected, analysed and submitted to the powder diffraction file (PDF).
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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- Twin point groups and the polychromatic symmetry of twins
- Bravais colourings of planar modules with N-fold symmetry
- Intensity distribution of the eight-beam case of the Si-888 reflection in backscattering geometry
- Crystal structures of GaX3 (X = Cl, Br, I) and AlI3
- Two new ammonium diphosphates: crystal structure of Mn0.5NH4H2P2O7·H2O and MnNaNH4P2O7·3H2O
- ´Pseudopolymorphs′ of 3aβ,4α-dihydro-4β,10-dimethyl-2-phenyl-1H,3H,5H-pyrrolo[3,4-b]carbazol-1,3-dione
- On racemic and L-malates: a comparison of their crystal structures
- Crystal and electronic structure of aqua(N-salicylidene-methylester-l-glutamato)Cu(II) monohydrate
Articles in the same Issue
- Twin point groups and the polychromatic symmetry of twins
- Bravais colourings of planar modules with N-fold symmetry
- Intensity distribution of the eight-beam case of the Si-888 reflection in backscattering geometry
- Crystal structures of GaX3 (X = Cl, Br, I) and AlI3
- Two new ammonium diphosphates: crystal structure of Mn0.5NH4H2P2O7·H2O and MnNaNH4P2O7·3H2O
- ´Pseudopolymorphs′ of 3aβ,4α-dihydro-4β,10-dimethyl-2-phenyl-1H,3H,5H-pyrrolo[3,4-b]carbazol-1,3-dione
- On racemic and L-malates: a comparison of their crystal structures
- Crystal and electronic structure of aqua(N-salicylidene-methylester-l-glutamato)Cu(II) monohydrate
