Journées d'Étude des Équilibres entre Phases
J. Phys. IV France 11 (2001) Pr10-213-Pr10-216
DOI: 10.1051/jp4:20011033
Le système eau-pyroglutamate de zinc : déshydratation et réhydratation des composés de coordination
P. Espeau1, A.M. Loireau-Lozac'h1, H. Allouchi2 and R. Céolin11 Laboratoire de Chimie Physique, Université Paris V, Faculté des Sciences Pharmaceutiques et Biologiques, 4 avenue de l'Observatoire, 75006 Paris, France
2 Laboratoire de Chimie Physique, Faculté de Pharmacie, 31 avenue Monge, 37200 Tours, France
Abstract
The relative stabilities of the (S-S) and (R-R, S-S) diaquabis(pyroglutamato)zinc(II) phases, both derived from density and solubility data, and thermal behaviour under pressure, are discussed. These phases dehydrate into amorphous and crystalline anhydrous phases upon heating, which rehydrate at room temperature under saturating water vapour through mechanisms that depend on crystallinity and presumably on diastereo-isomerism.
© EDP Sciences 2001