Acta Cryst. (2001). B57, 842-849 [doi:10.1107/S0108768101013684]
Abstract: The complexes of glutaric acid with L-arginine and L-histidine (two crystal forms) exhibit different stoichiometries and ionization states. The aggregation patterns in two of the crystals are remarkably similar to those observed earlier in similar structures, while the pattern in the remaining one has not been seen earlier. The variability in the ionization state and stoichiometry observed in amino acid-dicarboxylic acid complexes appears to represent subtle differences in the response of a molecule to the presence in its neighbourhood of another type of molecule. The glutaric acid molecules (or glutarate or semiglutarate ions) in their complexes and in other crystals favour a fully extended conformation, albeit with frequent departures from it. The change in the chirality of the component molecules in the complex could lead to drastic changes in the aggregation pattern; alternatively, the effects of the change are accommodated through small adjustments in essentially the same pattern.
Online 29 November 2001
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| Structure factor file (CIF format) (79.4 kbytes) |
| Structure factor file (CIF format) (204.5 kbytes) |
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