From unexpected reactions to a new family of ionic co-crystals: the case of barbituric acid with alkali bromides and caesium iodide.
Pressing solid barbituric acid with KBr to prepare samples for IR spectroscopy leads to the formation of an ionic co-crystal, in which the co-former is a classical ionic salt; co-crystal formation is also obtained with the other alkali bromides (LiBr, NaBr, RbBr and CsBr) and with caesium iodide. The simultaneous presence of alkali and halide ions affects the dissolution properties of barbituric acid in water.
Braga
Dario
D
Dipartimento di Chimica G. Ciamician, Università degli Studi di Bologna, via Selmi 2, 40126 Bologna, Italy.
Grepioni
Fabrizia
F
Maini
Lucia
L
Prosperi
Susanna
S
Gobetto
Roberto
R
Chierotti
Michele R
MR