Monoprotonatedo-Phenylenediamine Dihydrogenphosphate

p-Carboxyphenylammonium dihydrogenmonophosphate monohydrate

“…The ionic crystal structure of the title compound consists of dihydrogenmonophosphate anions, water molecules and p-carboxyphenylammonium cations linked to each other through hydrogen bonds. In the H 2 PO 4 À anions, there are two types of PÐO bonds, similar to those observed in other ionic compounds (Fabry et al, 1997;Trojette et al, 1998) The average CÐC distance of 1.382 A Ê and the average CÐ CÐC bond angle of 119.96 in the organic (HOOC±C 6 H 4 ± NH 3 ) + cations are normal. The phenyl rings are planar, with mean deviations from planarity of less than 0.0027.…”

Hydrogen bonding in 4-carboxyanilinium dihydrogenphosphate

“…The mean length of the terminal bonds is 1.5005 (9) Å , which is significantly shorter than the mean length of the P-OH bonds [1.5675 (9) Å ]. Bond lengths of the phosphate anions are in accordance with those observed in (II), and in other ionic compounds (Fá bry et al, 1997;Trojette et al, 1998). There is considerable expansion and reduction in bond angles O4-P-O2 [109.17 (7) in (I) compared with 105.9 in (II)] and O4-P-O3 [103.44 (7) in (I) compared with 106.8 in (II)], respectively.…”

Crystal structure of bis(2-aminoanilinium) hydrogen phosphate

“…Non-covalent interactions, such as hydrogen bonding and other weak interactions, represent the basic set of tools for the construction of elaborate supramolecular architectures of organic or inorganic-organic compounds. In this respect, the potential of monohydrogen and dihydrogen phosphate anions as useful building blocks has been investigated structurally (Shylaja et al, 2008;Oueslati et al, 2007;Jagan et al, 2015;Trojette et al, 1998;Soumhi & Jouini, 1995). Here we report the structure and the self-assembled supramolecular architecture exhibited through the formation of O-HÁ Á ÁO, N-HÁ Á ÁO and N-HÁ Á ÁN hydrogen bonds in bis(2-aminoanilinium) hydrogen phosphate.…”

“…Most of the hydrogen phosphate structures reported contain alkyl cations (Ilioudis et al, 2002;Mrad et al, 2012;Li et al, 2010), in which the alkyl cations encapsulated between chains of hydrogen phosphate are flexible with respect to the nature of the cations, which may induce a change in physical properties (Baouab & Jouini, 1998). As observed in the title compound, in the crystal structure of 2-aminoanilinium dihydrogen phosphate (CSD refcode: SAYWAQ; Trojette et al, 1998), the dihydrogen phosphate anions form chains, which are bridged by 2-aminoanilinium cations through N-HÁ Á ÁO hydrogen bonds, generating a two-dimensional inorganic-organic network. Conversely, in the crystal structure of 1,2-phenylenediammonium bis(dihydrogen phosphate) (ZAYPAQ; Soumhi & Jouini, 1995), the anions form inorganic sheets interlinked by 1,2-phenylenediammonium cations, thus generating a three-dimensional inorganic-organic framework.…”