Hydrated salt could block the growth of SARS-CoV-2

Nature India ◽  
2021 ◽  
Keyword(s):  
Hydrated Salt

scholarly journals Cyclooctanaminium hydrogen succinate monohydrate

2012 ◽  
Vol 68 (4) ◽  
pp. o1204-o1204 ◽  
Author(s):  
Sanaz Khorasani ◽  
Manuel A. Fernandes
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Ammonium Cation ◽  
Water Molecules ◽  
Hydrated Salt ◽  
A Chain ◽  
Hydrogen Bonded

In the title hydrated salt, C8H18N+·C4H5O4−·H2O, the cyclooctyl ring of the cation is disordered over two positions in a 0.833 (3):0.167 (3) ratio. The structure contains various O—H.·O and N—H...O interactions, forming a hydrogen-bonded layer of molecules perpendicular to thecaxis. In each layer, the ammonium cation hydrogen bonds to two hydrogen succinate anions and one water molecule. Each hydrogen succinate anion hydrogen bonds to neighbouring anions, forming a chain of molecules along thebaxis. In addition, each hydrogen succinate anion hydrogen bonds to two water molecules and the ammonium cation.

Supramolecular architectures in cytosinium 6-chloronicotinate monohydrate and 5-bromo-6-methylisocytosinium hydrogen sulfate

2018 ◽  
Vol 74 (3) ◽  
pp. 325-331
Author(s):  
Robert Swinton Darious ◽  
Nithianantham Jeeva Jasmine ◽  
Ammasai Karthikeyan ◽  
Packianathan Thomas Muthiah ◽  
Franc Perdih
Keyword(s):  
Hydrogen Bonds ◽  
Pyrimidine Ring ◽  
Hydrogen Sulfate ◽  
X Ray Diffraction ◽  
Sulfate Ion ◽  
Sulfate Ions ◽  
Supramolecular Architectures ◽  
Hydrated Salt ◽  
Sheet Structure ◽  
Hydrogen Bonded

Aminopyrimidine derivatives are biologically important as they are components of nucleic acids and drugs. The crystals of two new salts, namely cytosinium 6-chloronicotinate monohydrate, C4H6N3O+·C6H3ClNO2−·H2O, (I), and 5-bromo-6-methylisocytosinium hydrogen sulfate (or 2-amino-5-bromo-4-oxo-6-methylpyrimidinium hydrogen sulfate), C5H7BrN3O+·HSO4−, (II), have been prepared and characterized by single-crystal X-ray diffraction. The pyrimidine ring of both compounds is protonated at the imine N atom. In hydrated salt (I), the primaryR22(8) ring motif (supramolecular heterosynthon) is formedviaa pair of N—H...O(carboxylate) hydrogen bonds. The cations, anions and water molecule are hydrogen bonded through N—H...O, N—H...N, O—H...O and C—H...O hydrogen bonds, formingR22(8),R32(7) andR55(21) motifs, leading to a hydrogen-bonded supramolecular sheet structure. The supramolecular double sheet structure is formedviawater–carboxylate O—H...O hydrogen bonds and π–π interactions between the anions and the cations. In salt (II), the hydrogen sulfate ions are linkedviaO—H...O hydrogen bonds to generate zigzag chains. The aminopyrimidinium cations are embedded between these zigzag chains. Each hydrogen sulfate ion bridges two cationsviapairs of N—H...O hydrogen bonds andvice versa, generating twoR22(8) ring motifs (supramolecular heterosynthon). The cations also interact with one anotherviahalogen–halogen (Br...Br) and halogen–oxygen (Br...O) interactions.

Hydrogen-bonding patterns in bis[2,4,6-triazaniumylcyclohexane-1,3,5-tris(olate)-κ3O,O′,O′′]germanium(IV) tetrachloride hexahydrate

2016 ◽  
Vol 72 (1) ◽  
pp. 28-34
Author(s):  
Christian Neis ◽  
Bernd Morgenstern ◽  
Kaspar Hegetschweiler
Keyword(s):  
Hydrogen Bonding ◽  
Hydration Shell ◽  
Chloride Ions ◽  
Three Dimensions ◽  
Water Molecules ◽  
Amino Groups ◽  
Compound C ◽  
Hydrated Salt ◽  
Phd Thesis ◽  
Hydroxy Groups

A first preliminary report on the crystal structure of a hydrated salt formulated as [Ge(taci)2]Cl4·13H2O (taci is 1,3,5-triamino-1,3,5-trideoxy-cis-inositol) appeared more than 20 years ago [Ghisletta (1994). PhD thesis, ETH Zürich. Switzerland]. At that time it was not possible to discriminate unambiguously between the positions of some of the chloride ions and water O atoms, and disorder was thus postulated. In a new determination, a conclusive scheme of hydrogen bonding proves to be a particularly appealing aspect of the structure. Single crystals of the title compound, C12H30GeN6O64+·4Cl−·6H2O or [Ge(taci)2]2Cl8·12H2O, were grown from an aqueous solution by slow evaporation of the solvent. The two [Ge(taci)2]4+cations exhibit a double-adamantane-type structure with exclusive O-atom coordination and approximateD3dsymmetry. The taci ligands adopt a zwitterionic form with deprotonated hydroxy groups and protonated amino groups. Both cations are hydrogen bonded to six water molecules. The structure of the hydration shell of the two cations is, however, slightly different. The {[Ge(taci)2]·6H2O}4+aggregates are interlinked in all three dimensions by further hydrogen bonds of the types N—H...Cl...H—N, N—H...O(H)2...H—N, (Ge)O...H—O(H)...H—N, N—H...O(H)—H...Cl...H—N, (Ge)O...H—O—H...Cl...H—N, N—H...O(H)—H...Cl...H—(H)O...H—N, (Ge)O...H—O—H...Cl...H—(H)O...H—N and Ge(O)...H—O—H...Cl...H—O—H...O(Ge).

scholarly journals 4-Nitroanilinium 3-carboxy-4-hydroxybenzenesulfonate monohydrate

2013 ◽  
Vol 69 (11) ◽  
pp. o1609-o1609
Author(s):  
P. K. Sivakumar ◽  
M. Krishna Kumar ◽  
G. Chakkaravarthi ◽  
R. Mohan Kumar ◽  
R. Kanagadurai
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Three Dimensional ◽  
Carboxyl Group ◽  
Hydrated Salt ◽  
Dimensional Network ◽  
Hydroxy Groups ◽  
Ring Motif

In the title hydrated salt, C6H7N2O2+·C7H5O6S−·H2O, the benzene ring of the cation makes a dihedral angle of 1.32 (19)° with the attached nitro group. In the anion, an intramolecular O—H...O hydrogen bond with anS(6) ring motif is formed between the carboxyl and hydroxy groups; the dihedral angle between the carboxyl group and the benzene ring is 8.76 (8)°. The crystal structure exhibits intermolecular N—H...O, O—H...O, C—H...O, and π–π [centroid–centroid distances = 3.6634 (9) and 3.7426 (9) Å] interactions to form a three-dimensional network.

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