Structural features and N-H…O and O-H…O hydrogen-bonded supramolecular frameworks in 2-methylanilinium hydrogen DL-malate hydrate, 4-methoxyanilinium and 4-methylanilinium hydrogen DL-malate salts
| Autor: | Jagan Rajamoni, Sivakumar Kandasamy |
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| Rok vydání: | 2019 |
| Předmět: |
Hydrogen
010405 organic chemistry Hydrogen bond Supramolecular chemistry chemistry.chemical_element Crystal structure 010402 general chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences Crystallography chemistry Racemic mixture Molecule Physical and Theoretical Chemistry Hydrate |
| Zdroj: | Structural Chemistry. 31:917-925 |
| ISSN: | 1572-9001 1040-0400 |
| DOI: | 10.1007/s11224-019-01441-7 |
| Popis: | In the crystal structure of 2-methylanilinium hydrogen DL-malate hydrate (I), an additional water molecule is present in asymmetric unit. In the crystal structures of 4-methoxyanilinium hydrogen DL-malate (II) and 4-methylanilinium hydrogen DL-malate (III), the hydrogen malate anions exhibit configurational disorder with major component occupy S-configuration and minor component occupy R-configuration provided both (II) and (III) are prepared from a racemic mixture of DL-malic acid. In crystal structures of compounds (I)–(III), the hydrogen malate anions and anilinium cations from O-H…O and N-H…O hydrogen bonds which exhibit interesting supramolecular frameworks. In compound (I), the N-H…O and O-H…O hydrogen-bonded anionic-cationic framework form two-dimensional hydrophilic and hydrophobic layers in which the lattice water molecules are embedded in hydrophilic layers. However, in crystal structures of (II) and (III), the hydrogen DL-malate anions form two-dimensional anionic substructure through O-H…O hydrogen bond, in which the anilinium cations are anchored through N-H…O hydrogen bonds. |
| Databáze: | OpenAIRE |
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