Metal ion binding by amino acids. The crystal structure of racemic magnesium bis(hydrogen aspartate) tetrahydrate Mg(L‐AspH) (D‐AspH) · 4 H2O

Hubert Schmidbaur, Ina Bach, Dallas L. Wilkinson, Gerhard Müller

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Magnesium hydrogen L‐aspartate hydrogen D‐aspartate tetrahydrate Mg(D‐AspH)(L‐AspH) · 4 H2O crystallizes on cooling from the reaction mixture obtained from equivalent quantities of racemic aspartic acid and magnesium hydroxide in water under reflux conditions. The same product is also formed by slow racemization in analogous experiments carried out with pure L‐aspartic acid. – The compound crystallizes in the monoclinic space group P21/c with centrosymmetric complex units, in which magnesium is in an octahedral environment of four water oxygen atoms in the equatorial plane and two β‐carboxylate oxygen atoms in axial positions. The NH3+ and α‐CO 2− functions form a hydrogen‐bonded system integrating the individual molecules into a three‐dimensional network.

Original languageEnglish
Pages (from-to)1445-1447
Number of pages3
JournalChemische Berichte
Volume122
Issue number8
DOIs
StatePublished - Aug 1989
Externally publishedYes

Keywords

  • Amino acid complexes
  • Hydrogen DL‐aspartate complexes
  • Hydrogen bonding
  • Magnesium hydrogen DL‐aspartate tetrahydrate

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