Bis(2-amino-5-chloropyridinium) dihydrogendiphosphate

Abstract

The title compound, 2C5H6ClN2+·H2P2O72−, contains infinite (H2P2O72−)n ribbons extending along the c direction. The bridging O atom of the diphosphate anion is located on a twofold axis. The organic cations are anchored between planes parallel to ac, linking the ribbons into a three‐dimensional network.

2-Amino-5-chloropyridinium 2-carboxyacetate

“…For related structures, see: Pourayoubi et al (2007); Janczak & Perpé tuo (2009); Akriche & Rzaigui (2005). For details of hydrogen bonding, see: Jeffrey & Saenger (1991); Jeffrey (1997); Scheiner (1997).…”

2-Amino-5-chloropyridinium hydrogen succinate

“…For background to the chemistry of substituted pyridines, see: Pozharski et al (1997); Katritzky et al (1996). For related structures, see: Pourayoubi et al (2007); Akriche & Rzaigui (2005);Zaouali Zgolli et al (2009). For the structure of succinic acid, see: Gopalan et al (2000); Leviel et al (1981).…”

Crystal and molecular structure of 2‐amino‐5‐chloropyridinium hydrogen selenate—its IR and Raman spectra, DFT calculations and physicochemical properties

“…The theoretically determined structural parameters are generally similar to those observed for free ACP molecule 29 and its pyridinium salts. 30 (Table 3S). These differences follow from the presence of other hydrogen bonds not taken into account in the DFT calculations.…”

“…29 Bond lengths and angles can be regarded as normal and are comparable with values of other 2-amino-5-chloropyridinium compounds. 30,31 The pyridinium ring is essentially planar (the average deviation from least-square plane is 0.007Å) and also the Cl atom and the amino group are lying approximately in this plane, with a displacement of 0.061(4) and -0.009(5)Å for Cl and N2, respectively). The cations and anions form two-dimensional structure through a number of hydrogenbonding interactions involving the hydroxyl (OH), NH C and NH 2 amino groups as donors ( Fig.…”

“…The theoretically determined structural parameters are generally similar to those observed for free ACP molecule 29 and its pyridinium salts. 30,31,33 The important changes in their values are observed for the following bonds and angles: Se-O2 (1.605 ! 1.627), Se-O1(1.647 !…”