Bis(2-phenylbiguanidium) adipate tetrahydrate

Abstract

In the title salt, 2C8H12N5 +·C6H8O4 2−·4H2O, the anion is located on a centre of symmetry. The observed supra­molecular network of the crystal structure is produced by ten different hydrogen bonds of the N—H⋯N, N—H⋯O and O—H⋯O types. One additional O—H group is not connected to an acceptor site.

Inorganic Salts of N-phenylbiguanidium(1+)—Novel Family with Promising Representatives for Nonlinear Optics

“…The conformation of N-phenylbiguanidium(1+) cations in the crystal structures is further stabilised by one (in phbigua 2 SO 4 and in phbigua 2 HPO 3 -one of the cations) or two N-H...N intramolecular hydrogen bonds (see Tables S3-S9, Supplementary Materials) described by graph set descriptor S (6). A very similar situation was also observed in the previously studied biguanide salts [24,29,32,33].…”

“…The values of interplanar angles in the biguanide part of the cations range from 36 to 50 • . To compare the values determined in previously studied biguanide and Nphenylbiguanide salts, see references [24,29,30,32,33]. The values of the interplanar angles of the phenyl ring plane and neighbouring "guanidine" plane range from 15 to 71 • .…”

“…The aim of this paper is to extend the small family of N-phenylbiguanidium(1+) crystalline salts [27,28,[32][33][34] by preparing novel members containing inorganic anions (as co-crystallisation partners) with diverse symmetries and hydrogen bonding potential for activating different self-assembly modes in crystal packing, thereby obtaining new, prospective molecular materials for NLO. For this purpose, seven novel compounds, N-phenylbiguanidium(1+) nitrate (phbiguaNO 3 ), N-phenylbiguanidium(1+) perchlorate (phbiguaClO 4 ), N-phenylbiguanidium(1+) hydrogen carbonate (phbiguaHCO 3 ), bis(Nphenylbiguanidium(1+)) sulfate (phbigua 2 SO 4 ), bis(N-phenylbiguanidium(1+)) hydrogen phosphate sesquihydrate (phbigua 2 HPO 4 1.5H 2 O), bis(N-phenylbiguanidium(1+)) phosphite (phbigua 2 HPO 3 ), and bis(N-phenylbiguanidium(1+)) phosphite dihydrate (phbigua 2 HPO 3 2H 2 O) were prepared and characterised both structurally and spectroscopically.…”

4-Aminobenzoic acid 4-methylpyridine/4-methylpyridinium 4-aminobenzoate 0.58/0.42: a redetermination from the original data

“…2). This O1Á Á ÁN2 iii hydrogen bond is even longer than the O3Á Á ÁN1 hydrogen bond with a disordered bridging hydrogen atom that was observed in a recently determined structure 2,4,6-triaminopyrimidinium(1+) x hydrogen trioxofluorophosphate(1À) x monohydrate/2,4,6-triaminopyrimidinium(2+) (1-x) trioxofluorophosphate(2À) (1-x) monohydrate, where x = 0.73, at room temperature (Matulková et al, 2017). The latter OÁ Á ÁN hydrogen bond measured to be 2.5822 (16) Å and is ranked among the longest known OÁ Á ÁN hydrogen bonds with a disordered bridging hydrogen atom.…”

1,1-Dimethylbiguanidium(2+) dinitrate

“…For related structures of dication salts, see: Lemoine et al (1994); Lu et al (2004b). For related salt materials, see: Fridrichová et al (2010); Matulková et al (2011). For graph-set analysis of hydrogen bonds, see: Etter et al (1990).…”