18-20 November 2020
Hosted virtually by the AfLS & AfPS
Africa/Johannesburg timezone
AfLS2020 and AfPS2020 - Towards a brighter future

A comparative study of two polymorphs of L-aspartic acid hydrochloride

20 Nov 2020, 17:25
1h
Zoom (sent to registered delegates) (Hosted virtually by the AfLS & AfPS)

Zoom (sent to registered delegates)

Hosted virtually by the AfLS & AfPS

Africa

Speaker

Dr Rim Benali-Cherif (LASPI2A)

Description

Two polymorphs of l-aspartic acid hydrochloride, C4H8NO4+Cl-, were obtained from the same aqueous solution.Their crystal structures have been determined from singlecrystal data collected at 100 K. The crystal structures revealed three- and two-dimensional hydrogen-bonding networks forthe triclinic and orthorhombic polymorphs, respectively. The cations and anions are connected to one another via N—H...Cl and O—H...Cl interactions and form alternating cation–anion layer-like structures. The two polymorphs share common structural features; however, the conformations of the l-aspartate cations and the crystal packings are different. Furthermore, the molecular packing of the orthorhombic polymorph contains more interesting interactions which seems to be a favourable factor for more efficient charge transfer within the crystal.

Primary author

Dr Rim Benali-Cherif (LASPI2A)

Co-authors

Prof. Nourredine Benali-Cherif (Académie Algérienne des sciences) Dr Radhwane Takouachet (LASPI2A)

Presentation Materials