In the structure of the title compound, 2C7H8NO2
+·2ClO4
−·H2O, the ions are connected via N—H⋯O, N—H⋯(O,O), O—H⋯O, O—H⋯(O,O) and C—H⋯O hydrogen bonds into a three-dimensional network.
Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.002 Å; R factor = 0.021; wR factor = 0.054; data-to-parameter ratio = 16.2.In the anion of the title compound, (C 7 H 11 N 2 )[CoCl 3 -(C 7 H 10 N 2 )], the Co II ion is coordinated by one N atom from a 4-(dimethylamino)pyridine (DMAP) ligand and three Cl atoms, forming a CoNCl 3 polyhedron with a distorted tetrahedral geometry. In the crystal, cations and anions are linked via weak N-HÁ Á ÁCl and C-HÁ Á ÁCl hydrogen bonds. Double layers of complex anions stack along the b-axis direction, which alternate with double layers of 4-(dimethylamino)-pyridinium cations.
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Data collectionBruker APEXII diffractometer 7932 measured reflections 3230 independent reflections 2982 reflections with I > 2(I) R int = 0.012
In the title salt, [Co(C7H9NO)2(H2O)2]Cl2, the CoII cation, located on an inversion center, is N,O-chelated by two hydroxyethylpyridine ligands and coordinated by two water molecules in a distorted O4N2 octahedral geometry. In the crystal, the Cl− anions link with the complex cations via O—H⋯Cl hydrogen bonds, forming a three-dimensional supramolecular architecture. π–π stacking is observed between the pyridine rings of adjacent molecules [centroid–centroid distance = 3.5810 (11) Å].
Due to their rich structural chemistry and wide variety of applications, borate materials have provided a rich area of research. In a continuation of this research, diethylammonium bis(2-oxidobenzoato-κO,O)borate, CHN·BO(CHO), (1), and propylammonium bis(2-oxidobenzoato-κO,O)borate, CHN·BO(CHO), (2), have been synthesized by the reaction of boric acid with salicylic acid under ambient conditions. In both structures, the B atom exhibits a slightly distorted tetrahedral environment formed by the bidentate coordination of two salicylate anions via the O atoms of the central carboxylate and oxide groups. In the crystals of salts (1) and (2), mixed cation-anion layers lying parallel to the (101) plane are formed through N-H...O, C-H...O and C-H...π/N-H...O hydrogen-bonding interactions, resulting, in each case, in a two-dimensional supramolecular architecture in the solid state. The photoluminescence properties of the salts were studied using the as-synthesized samples and reveal that salts (1) and (2) both display a strong blue-light emission, with maxima at 489 and 491 nm, respectively. In DFT/TD-DFT (time-dependent density functional theory) studies, the blue emission appears to be derived from an intramolecular charge transfer (ICT) excited state. In addition, IR and UV-Vis spectroscopies were used to investigate the title salts.
In the title complex, [Zn(N3)2(C7H10N2)2], the ZnII atom is coordinated by two N atoms from two 4-(dimethylamino)pyridine (DMAP) ligands and by two N atoms from two azide anions in a distorted tetrahedral coordination geometry. In the crystal, weak C—H⋯N hydrogen bonds between the DMAP and azide ligands link these discrete complex molecules into a three-dimensional supramolecular network.
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