67 research outputs found
Hydrogen bonding in 1-carboxypropanaminium nitrate
There are two crystallographically independent cations and two anions in the asymmetric unit of the title compound, C4H5NO2
+·NO3
−. In the crystal, the 1-carboxypropanaminium cations and nitrate anions are linked to each other through strong N—H⋯O and O—H⋯O hydrogen bonds, forming a three-dimensional complex network. C—H⋯O interactions also occur
Hydrogen bonding in cytosinium dihydrogen phosphite
In the title compound, C4H8N3O4P+·H2PO3
−, the cytosine molecule is monoprotonated and the phosphoric acid is in the monoionized state. Strong hydrogen bonds, dominated by N—H⋯O interactions, are responsible for cohesion between the organic and inorganic layers and maintain the stability of this structure
3-Methylanilinium nitrate
In the title compound, C7H10N+·NO3
−, the 3-methylanilinium cations interact with the nitrate anions through strong bifurcated N+—H⋯(O,O) hydrogen bonds, forming a two-dimensional hydrogen-bonded network
Anilinium hydrogen sulfate
The asymmetric unit of the title compound, C6H8N+·HSO4
−, contains two cations and two anions which are linked to each other through N—H⋯O hydrogen bonds, formed by all H atoms covalently bonded to the N atoms. In addition, strong O—H⋯O anion–anion hydrogen-bond interactions are also observed
Cytosinium–hydrogen maleate–cytosine (1/1/1)
The title organic salt, C4H6N3O+·C4H3O4
−·C4H5N3O, was synthesized from cytosine base and maleic acid. An intramolecular O—H⋯O hydrogen bond occurs in the hydrogen maleate anion. The crystal packing is stabilized by intermolecular N—H⋯O, N—H⋯N and C—H⋯O hydrogen bonds, giving rise to a nearly planar two-dimensional network parallel to (101)
trans-Diaquabis(dl-valinato-κ2 N,O)nickel(II)
In the title complex, [Ni(C5H9NO2)2(H2O)2], the NiII atom, located on a centre of inversion, is trans-coordinated by two O atoms and two N atoms from d-bidentate valine and l-bidentate valine ligands and two water O atoms in an octahedral geometry. In the crystal, the discrete mononuclear units are linked into a three-dimensional network via O—H⋯O and N—H⋯O hydrogen bonds. C—H⋯O interactions are also observed
4-Methylanilinium nitrate
The asymmetric unit of the title compound, C7H10N+·NO3
−, consists of a 4-methylanilinium cation protonated at the amino group and a nitrate anion. In the crystal, anions and cations are linked through N—H⋯O and N—H⋯(O,O) hydrogen bonds, buiding a corrugated layer structure parallel to (001)
Synthesis of Some New 3-Pyrrolidinylquinoline Derivatives via 1,3-Dipolar Cycloaddition of Stabilized Azomethine Ylides to Quinolinyl α,β- Unsaturated Ketones
International audienceN-Metallated azomethine ylide generated from methyl (E)-N-benzylideneglycinate, LiBr and triethylamine underwent cycloaddition to quinolyl α,β- unsaturated ketones with excellent diastereoselectivity to afford new functionalised 3-pyrrolidinylquinoline derivatives
(4S)-4-Benzyl-N-{[(4S)-4-benzyl-2-oxo-1,3-oxazolidin-3-yl]sulfonyl}-2-oxo-1,3-oxazolidine-3-carboxamide
The title compound, C21H21N3O7S, contains an oxazolidinone ring and a sulfonamide group, both characteristic for biologically and pharrmaceutically active compounds. Both stereogenic centres reveal an S absolute configuration. The two oxazolidinone rings are in an envelope conformation with the methylene carbon flap atoms deviating by 0.428 (1) and 0.364 (2) Å from the best least-square planes formed by the four other ring atoms. An intramolecular N—H⋯O hydrogen bond contributes to the folded conformation of the molecule. In the crystal, weak intermolecular C—H⋯O interactions connect the molecules into helices along the the twofold screw axes
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