A new polymorph of sulfanilic acid monohydrate

Abstract

An ortho­rhom­bic polymorph of sulfanilic acid monohydrate, C6H7NO3S·H2O, is described in which there are significant hydrogen‐bonding inter­actions between the components of the structure.

The ephemeral dihydrate of sulfanilic acid

“…The conformation in AFAZEM01 (Callear & Hursthouse, 2008) comes closest to the geometry of our title compound. A unique feature of SANACM01 (Banu & Golzar Hossain, 2006) is the eclipsed arrangement of the sulfonate and anilinium groups. Despite the commonly accepted limitations of X-ray-based H-atom positions, we are confident that the conformational differences between SANACM01 and the present determination are meaningful; we were able to access the intensity data of the former via the web page of the journal and repeat the structure refinement.…”

“…In our comparisons below, we will refer to the inital report by Rae & Maslen (1962). A second polymorph of the monohydrate was detected decades later (Banu & Golzar Hossain, 2006); the crystals were obtained by slow evaporation from methanol; the water of crystallization might come directly from the solvent or from atmospheric moisture. The first structurally characterized anhydrous crystal form was reported by Low & Glidewell (2002); this orthorhombic phase was recovered from an aqueous solution.…”

4-Aminopyridinium 4-aminobenzenesulfonate 4-ammoniobenzenesulfonate monohydrate

“…Sulfanilic acid (4-aminobenzenesulfonic acid or p-anilinesulfonic acid) readily forms diazo compounds and is used to make dyes and sulpha drugs. The crystal structure of monoclinic and orthorhombic polymorphs of sulfanilic acid monohydrate have been reported (Rae & Maslen, 1962;Banu & Golzar Hossain, 2006).…”

“…For related literature, see: Anderson et al (2005); Banu & Golzar Hossain (2006); Chao & Schempp (1977); Judge & Bever (2006); Rae & Maslen (1962); Schwid et al (1997); Strupp et al (2004). Symmetry codes: (i) x; y À 1; z; (ii) x; y þ 1; z þ 1; (iii) x; y; z þ 1; (iv) Àx þ 1; y; Àz; (v)…”

Growth and Characterization of Semiorganic Non-linear Optical Material: (((4-aminophenyl)sulphonyl)oxy)zinc(II)chloride Crystal

“…In the review of literature of sulphanilic acid and its base crystals: methylammonium sulphanilate [11], tetrabutylammonium 4-aminobenzenesulphonate 2/3 hydrate [12], piperazine1-4-diium bis(4-aminobenzenesulphonate) [13], sulphanilic acid doped L proline and L-lysicine [14], sodium sulphanilate dehydrate (SSDH) [15,16], lithium sulphanilate hydrates (LS) [17], potassium carbonate sulphanilic acid [18], lithium sulphate, zinc sulphate, cadmium sulphate [19] [Bi 6 O 6 (OH)] (NH 2 C 6 H 4 SO 3 ) 4 [20], sulphanilic acid monohydrate [21], N,N-thiocarbonyl bis(4-aminobenzene sulphonamide) with barium chloride [22], and shiff-based sulphanilic acid-based crystals, sulphanillic acid single crystal, bis(4-aminobenzenesulphonato-kappa N)bis(2,2biimidazole-kappa N-2,N )copper(II)-dihydrate [23][24][25][26][27][28][29][30] have been studied and reported. Organic-based materials showed excellent mechanical and thermal responses compared with inorganic-based materials because of π-electron delocalization [31,32].…”