2-Amino-5-chloro­pyridinium trifluoro­acetate

The asymmetric unit of the title salt, C5H6ClN2 +·C2F3O2 −, contains two independent 2-amino-5-chloro­pyridinium cations and two independent trifluoro­acetate anions. The F atoms of both anions are disordered over two sets of positions, with occupancy ratios of 0.672 (12):0.328 (12) and 0.587 (15):0.413 (15). In the crystal, the cations and anions are linked via N—H⋯O and C—H⋯O hydrogen bonds, forming a two-dimensional network parallel to (001)

2-Amino-5-methyl­pyridinium 4-hydroxy­benzoate

In the title salt, C6H9N2 +·C7H5O3 −, the carboxyl­ate mean plane of the 4-hydroxy­benzoate anion is twisted by 13.07 (4)° from the attached ring. In the crystal structure, the ions are linked into a two-dimensional network by N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds. Within this network, the N—H⋯O hydrogen bonds generate R 2 2(8) ring motifs. In addition, π–π inter­actions involving the pyridinium rings, with a centroid–centroid distance of 3.7599 (4) Å, are observed

2-Amino-5-chloro­pyridinium 4-carb­oxy­butano­ate

In the title salt, C5H6ClN2 +·C5H7O4 −, the 2-amino-5-chloro­pyridinium cation is essentially planar, with a maximum deviation of 0.010 (3) Å. In the crystal structure, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxyl­ate O atoms of the anion via a pair of N—H⋯O hydrogen bonds, forming an R 2 2(8) ring motif. The ion pairs are further connected via O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds, forming a layer parallel to the bc plane. In the layer, the hydrogen glutarate anions self-assemble via O—H⋯O hydrogen bonds, forming a supra­molecular chain along the c axis. Furthermore, the cations and anions are stacked down along the a axis, forming a three-dimensional network

2-Amino-5-bromo­pyridine–4-hy­droxy­benzoic acid (1/1)

The title 1:1 adduct, C5H5BrN2·C7H6O3, contains two mol­ecules of each species in the asymmetric unit, with similar geometries. In the crystal, mol­ecules are linked to form extended chains along [100] by N—H⋯O, O—H⋯O, O—H⋯N and C—H⋯O hydrogen bonds. Adjacent chains are crosslinked via further N—H⋯O inter­actions into sheets lying parallel to (001). The crystal studied was an inversion twin with a 0.54 (2):0.46 (2) domain ratio

Ethics of Personal Life in ‘Thandalaiyar Sathakam’

The literature that appears in each period provides various life ideas to the people of that period. The law books summarize the perfect principles required for a human life driven by the mind, language, and truths. These jurisprudence books speak of the idea that all the people living in the world should live happy lives. Most of the Sathakams (A Miniature genre of literature consisting of a hundred hymns) are moral pieces of literature that deal with ethical ideas. The Sathakam literature spelled out the different kinds of virtues for man to live. The virtues which may be found in the Sathakam literature, are 1. the ethics of individual life, 2. Family life ethics, and 3. Social life ethics can be divided into three categories. Among them, this article deals with the ethics of individual life contained in the Thandalaiyar Satakam

Bis(2,3-diamino­pyridinium) phthalate dihydrate

The complete anion of the title hydrated mol­ecular salt, 2C5H8N3 +·C8H4O4 −·2H2O, is generated by a crystallographic twofold axis. In the crystal, the cations, anions and water mol­ecules are connected by N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds, forming a three-dimensional network. The crystal structure also features C—H⋯π inter­actions

2-Amino-5-chloro­pyridinium salicylate

In the crystal structure of the title salt, C5H6ClN2 +·C7H5O3 −, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxyl­ate O atoms via a pair of N—H⋯O hydrogen bonds, forming R 2 2(8) ring motifs. These motifs are centrosymmetrically paired via N—H⋯O hydrogen bonds, forming a complementary donor–donor–acceptor–acceptor (DDAA) array. A typical intra­molecular O—H⋯O hydrogen bond is also observed in the salicylate anion. The crystal structure is further stabilized by weak C—H⋯π inter­actions

Bis­(2-amino-5-methyl­pyridinium) fumarate–fumaric acid (1/1)

In the crystal structure of the title compound, C6H9N2 +·0.5C4H2O4 2−·0.5C4H6O4, the fumarate dianion and fumaric acid mol­ecule are located on inversion centres. The 2-amino-5-methyl­pyrimidinium cation inter­acts with the carboxyl­ate group of the fumarate anion through a pair of N—H⋯O hydrogen bonds, forming an R 2 2(8) ring motif. These motifs are centrosymmetrically paired via N—H⋯O hydrogen bonds, forming a complementary DDAA array. The carboxyl groups of the fumaric acid mol­ecules and the carboxyl­ate groups of the fumarate anions are hydrogen bonded through O—H⋯O hydrogen bonds, leading to a supra­molecular chain along [101]. The crystal structure is further stabilized by weak C—H⋯O hydrogen bonds

2-Amino-4-methyl­pyridinium 3-chloro­benzoate

In the title salt, C6H9N2 +·C7H4ClO2 −, the 2-amino-4-methyl­pyridinium cation is almost planar, with a maximum deviation of 0.010 (1) Å. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxyl­ate O atoms of the anion via a pair of N—H⋯O hydrogen bonds, forming an R 2 2(8) ring motif. The ion pairs are further connected via N—H⋯O and C—H⋯O hydrogen bonds, forming a two-dimensional network parallel to the bc plane