Crystal structure of a new ordered form of ammonium hydrogen succinate NH4HC4H4O4 - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of Chemical Crystallography Année : 2020

Crystal structure of a new ordered form of ammonium hydrogen succinate NH4HC4H4O4

Résumé

Triclinic ammonium hydrogen succinate compound (space group P1−) is known to present very short O–H⋅⋅⋅O hydrogen bonds in association with a second-order phase transition around 170 K. Whatever the temperature, its crystal structure is characterized by a statistical distribution of the hydrogen atom belonging to the hydrogen succinate molecule on two crystallographic sites, leading to a disordered structure. In this study, we report on the crystal structure of a new ordered structural form of the title compound NH4HC4H4O4, determined by single-crystal X-ray diffraction at room temperature. This new ordered form crystallizes in the triclinic space group P1− with refined cell parameters: a = 6.4868(16) Å, b = 7.4313(17) Å, c = 7.4339(17) Å, α = 112.058(8)°, β = 96.477(9)°, γ = 109.026(8)° and V = 302.45(12) Å3. Hydrogen succinate molecules are in trans conformation in the ordered form and in gauche conformation in the disordered one. It leads to different molecular assemblies of the ammonium cations and hydrogen succinate anions, and consequently, to different hydrogen bond networks. The crystal structure stability of this new ordered structural form is discussed and compared to that of the disordered form.
Fichier principal
Vignette du fichier
Lemoine-2019-Crystal Structure of a New Ordered form-Final version.pdf (688.01 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02127330 , version 1 (13-05-2019)

Identifiants

Citer

Pierric Lemoine, Noee Dumait, Vincent Dorcet, Stéphane Cordier. Crystal structure of a new ordered form of ammonium hydrogen succinate NH4HC4H4O4. Journal of Chemical Crystallography, 2020, 50 (1), pp.35-40. ⟨10.1007/s10870-018-0757-8⟩. ⟨hal-02127330⟩
40 Consultations
142 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More