The title compound features bifurcated template-to-framework N—H⋯(O,O) hydrogen bonds.
In the title compound, {(C6H8N)[Zn2(HPO3)2(H2PO3)]} n , the constituent ZnO4, HPO3 and H2PO3 polyhedra of the inorganic component are linked into (010) sheets by Zn—O—P bonds (mean angle = 134.4°) and the layers are reinforced by O—H⋯O hydrogen bonds. The protonated templates are anchored to the inorganic sheets via bifurcated N—H⋯(O,O) hydrogen bonds.
The title complex exhibits a distorted octahedral geometry about the metal centre, which coordinates two tridentate ligands that are perpendicular to each other.
In the title compound, [Ni(C13H13N4S)2]·0.33CH3OH·0.67H2O, the NiII atom is coordinated by two tridentate quinoline-2-carboxaldehyde 4-ethylthiosemicarbazonate ligands in a distorted octahedral shape. At 100 K, the crystal symmetry is monoclinic (space group P21/n). A mixture of water and methanol crystallizes with the title complex, and one of the ethyl groups in the coordinating ligands is disordered over two positions, with an occupancy ratio of 58:42. There is intermolecular hydrogen bonding between the solvent molecules and the amine and thiolate groups in the ligands. No other significant interactions are present in the crystal packing.
The crystal structure of a new ethidium salt has been determined. Two ethidium cations self-associate to form a dimer through π–π interactions.
In the title salt solvate (systematic name: 8-amino-5-ethyl-6-phenylphenanthridin-5-ium benzoate methanol monosolvate), C21H20N3 +·C6H5CO2 −·CH3OH, two ethidium cations, C21H20N3 +, dimerize about a twofold axis through π–π interactions [inter-centroid separation = 3.6137 (4) Å]. The benzoate anions are connected through hydrogen bonding with the –NH2 groups of the ethidium cations and the –OH group of the MeOH molecule. The MeOH molecule also accepts a hydrogen bond from the –NH2 group of the ethidium cation. The result is a one-dimensional hydrogen-bonded chain along the b-axis direction.
The π-conjugated planar title molecules are assembled through C—H⋯π interactions between neighboring molecules, resulting in stacking along the c-axis.
The title compound, C22H24N2O2, crystallizes in space group P21/n. The molecular structure is almost planar except for a tilt of the phenyl rings. The allyl groups on both ends exhibit the trans-form and the connected N atoms show sp 2 character. The molecules are stacked and assembled along the c-axis direction by C—H⋯π interactions.
The cation of the title hydrated salt is a diazaborinane featuring substitution at 1, 2, and 3 positions in the nitrogen–boron six-membered heterocycle. In the crystal, the cations stack along [100] in an alternating head-to-tail manner, while the iodide ion and water molecule form one-dimensional hydrogen-bonded chains beside the cation stack. The cation stacks and I−–water chains are crosslinked by N—H⋯I and N—H⋯O hydrogen bonds.
The cation of the title hydrated salt, C17H17BN3 +·I−·H2O, is a diazaborinane featuring substitution at the 1, 2, and 3 positions in the nitrogen–boron six-membered heterocycle. The cation is approximately planar with a dihedral angle between the pyridyl ring and the diazaborinane ring system of 5.40 (5)°. In the crystal, the cations stack along [100] in an alternating head-to-tail manner, while the iodide ion and water molecule form one-dimensional hydrogen-bonded chains beside the cation stack. The cation stacks and I−–water chains are crosslinked by N—H⋯I and N—H⋯O hydrogen bonds.
The crystal structure model of germacrone type II determined from single-crystal X-ray data is compared with that of a previous synchrotron X-ray powder study
The extraction and purification procedures, crystallization and crystal structure refinement (single-crystal X-ray data) of germacrone type II, C15H22O, are presented. The structural results are compared with a previous powder X-ray synchrotron study [Kaduk et al. (2022#). Powder Diffr. 37, 98–104], revealing significant improvements in terms of accuracy and precision. Hirshfeld atom refinement (HAR), as well as Hirshfeld surface analysis, give insight into the intermolecular interactions of germacrone type II.
The chiral title compound forms supramolecular chains, through N—H⋯O hydrogen bonds between the amide and carboxylate groups.
The title molecule, C12H15NO5, is a methyl carbamate derivative obtained by reacting (R)-2-phenylglycinol and methyl chloroformate, with calcium hydroxide as heterogeneous catalyst. Supramolecular chains are formed in the [100] direction, based on N—H⋯O hydrogen bonds between the amide and carboxylate groups. These chains weakly interact in the crystal, and the phenyl rings do not display significant π–π interactions.
There are two crystallographically independent molecules in the asymmetric unit of the title compound, which are linked by pairwise O—H⋯O hydrogen bonds.
The title compound, C13H10FNO2, was obtained by the reaction of 2-bromo-4-fluorobenzoic acid with aniline. There are two independent molecules, A and B, in the asymmetric unit, with slight conformational differences: the dihedral angles between the aromatic rings are 55.63 (5) and 52.65 (5)°. Both molecules feature an intramolecular N—H⋯O hydrogen bond. In the crystal, the molecules are linked by pairwise O—H⋯O hydrogen bonds to form A–B acid–acid dimers and weak C—H⋯F interactions further connect the dimers.
Structural analysis of the title diasteromeric sulfone determines this to be the erythro (RR/SS) isomer, and was pivotal in showing that the 1,3-elimination reactions of these compounds, which lead to substituted stilbenes, occur with inversion at each asymmetric carbon atom.
The title compound, C16H17BrO2S, crystallizes as the erythro (RR/SS) isomer of a pair of sulfones that were diastereomeric due to chirality of the α-carbon atoms on the sulfone sulfur atom. The structural analysis was pivotal in showing that the 1,3 elimination reactions of these compounds, which lead to substituted stilbenes, occur with inversion at each asymmetric carbon atom. In the crystal, C—H⋯Br and C—H⋯O hydrogen bonds link the molecules into a tri-periodic intermolecular network.
The cationic complex of the title salt, [Ru(C19H13N5)2](PF6)2·3C4H10O, has the Ru atom in a slightly distorted octahedral environment of two tridentate benzimdazolyl-pyridine ligands and displays extensive π–π and C—H⋯π interactions.
The title compound, [Ru(C19H13N5)2](PF6)2·3C4H10O, was obtained from the reaction of Ru(bimpy)Cl3 [bimpy is 2,6-bis(1H-benzimidazol-2-yl)pyridine] and bimpy in refluxing ethanol followed by recrystallization from diethyl ether/acetonitrile. At 125 K the complex has orthorhombic (Pca21) symmetry. It is remarkable that the structure is almost centrosymmetric. However, refinement in space group Pbcn leads to disorder and definitely worse results. It is of interest with respect to potential catalytic reduction of CO2. The structure displays N—H⋯O, N—H⋯F hydrogen bonding and significant π–π stacking and C—H⋯π stacking interactions.
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