The author of 《Twelve 4-(4-methoxyphenyl)piperazin-1-ium salts containing organic anions: supramolecular assembly in one, two and three dimensions》 were Kiran Kumar, Haruvegowda; Yathirajan, Hemmige S.; Foro, Sabine; Glidewell, Christopher. And the article was published in Acta Crystallographica, Section E: Crystallographic Communications in 2019. SDS of cas: 586-76-5 The author mentioned the following in the article:
Twelve 4-(4-methoxyphenyl)piperazin-1-ium salts containing organic anions have been prepared and structurally characterized. The monohydrated benzoate, 4-fluorobenzoate, 4-chlorobenzoate and 4-bromobenzoate salts, C11H17N2O+·C7H5O2-·H2O (I), C11H17N2O+·C7H4FO2-·H2O (II), C11H17N2O+·C7H4ClO2-·H2O (III), and C11H17N2O+·C7H4BrO2-·H2O (IV), resp., are isomorphous and all exhibit disorder in the 4-methoxyphenyl unit: the components are linked by N-H···O and O-H···O hydrogen bond to form chains of rings. The unsolvated 2-hydroxybenzoate, pyridine-3-carboxylate and 2-hydroxy-3,5-dinitrobenzoate salts, C11H17N2O+·C7H5O3- (V), C11H17N2O+·C6H4NO2- (VI) and C11H17N2O+·C7H3N2O7- (VII), resp., are all fully ordered: the components of (V) are linked by multiple N-H···O hydrogen bonds to form a chain of rings; those of (VI) are linked into a three-dimensional framework by a combination of N-H···O, C-H···O and C-H···N hydrogen bonds and those of (VII), where the anion has a structure reminiscent of the picrate anion, are linked into a three-dimensional array by N-H···O and C-H···O hydrogen bonds. The hydrogensuccinate and hydrogenfumarate salts, C11H17N2O+·C4H5O4- (VIII) and C11H17N2O+·C4H3O3- (IX), resp., are isomorphous, and both exhibit disorder in the anionic component: N-H···O and O-H···O hydrogen bonds link the ions into sheets, which are further linked by C-H···π(arene) interactions. The anion of the hydrogenmaleate salt, C11H17N2O+·C4H3O3- (X), contains a very short and nearly sym. O···H···O hydrogen bond, and N-H···O hydrogen bonds link the anions into chains of rings. The ions in the trichloroacetate salt, C11H17N2O+·C2Cl3O2- (XI), are linked into simple chains by N-H···O hydrogen bonds. In the hydrated chloranilate salt, 2C11H17N2O+·C6Cl2O42-·2H2O (XII), which crystallizes as a non-merohedral twin, the anion lies across a center of inversion in space group P21/n, and a combination of N-H···O and O-H···O hydrogen bonds generates complex sheets. Comparisons are made with the structures of some related compounds In the experiment, the researchers used many compounds, for example, 4-Bromobenzoic acid(cas: 586-76-5SDS of cas: 586-76-5)
4-Bromobenzoic acid(cas: 586-76-5) has been used to study the metabolic fate of 2-,3-and 4-bromo benzoic acids in rat hepatocytes incubation using high temperature liquid chromatography. It was used in bromine-specific detection of the metabolites of 2-,3-and 4-bromobenzoic acid in the urine and bile of rats by inductively coupled plasma mass spectrometry.SDS of cas: 586-76-5
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary