scholarly journals Bis(4-aminopyridinium) dichromate(VI)

2014 ◽  
Vol 70 (7) ◽  
pp. m263-m264 ◽  
Author(s):  
Sonia Trabelsi ◽  
Thierry Roisnel ◽  
Hassouna Dhaouadi ◽  
Houda Marouani
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Supramolecular Network ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Shortest Distance ◽  
Dichromate Anions

The asymmetric unit of the title salt, (C5H7N2)2[Cr2O7], contains four independent cations and two independent dichromate anions. The crystal structure consists of discrete dichromate anions with an eclipsed conformation stacked in layers parallel to (010) aty= 1/4 andy= 3/4. These layers are linkedvia4-aminopyridinium cations by N—H...O and weak C—H...O hydrogen bonds, forming a three-dimensional supramolecular network. In addition, π–π interactions are present in this structure; the shortest distance separating mean planes through 4-aminopyridinium cations is 3.679 (6) Å.

scholarly journals Dopaminium nitrate

2014 ◽  
Vol 70 (5) ◽  
pp. o571-o572
Author(s):  
Sofian Gatfaoui ◽  
Houda Marouani ◽  
Thierry Roisnel ◽  
Hassouna Dhaouadi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Supramolecular Network ◽  
Asymmetric Unit ◽  
Nitrate Ions ◽  
Nitrate Anions

The asymmetric unit of the title salt [systematic name: 2-(3,4-dihydroxyphenyl)ethanaminium nitrate], C8H12NO2+·NO3−, contains two independent cations and two independent nitrate anions. The crystal structure consists of discrete nitrate ions stacked in layers parallel to (010). These layers are linkedviathe dopaminium cations by O—H...O, N—H...O and weak C—H...O hydrogen bonds, forming a three-dimensional supramolecular network.

scholarly journals Crystal structure ofN-(quinolin-6-yl)hydroxylamine

2014 ◽  
Vol 70 (11) ◽  
pp. 322-324 ◽  
Author(s):  
Anuruddha Rajapakse ◽  
Roman Hillebrand ◽  
Sarah M. Lewis ◽  
Zachary D. Parsons ◽  
Charles L. Barnes ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Compound C ◽  
Independent Molecules ◽  
A Minor

The title compound, C9H8N2O, crystallized with four independent molecules in the asymmetric unit. The four molecules are linkedviaone O—H...N and two N—H...N hydrogen bonds, forming a tetramer-like unit. In the crystal, molecules are further linked by O—H...N and N—H...O hydrogen bonds forming layers parallel to (001). These layers are linkedviaC—H...O hydrogen bonds and a number of weak C—H...π interactions, forming a three-dimensional structure. The crystal was refined as a non-merohedral twin with a minor twin component of 0.319.

scholarly journals Benzene-1,2-diaminium bis(hydrogen phosphonate)

IUCrData ◽  
2016 ◽  
Vol 1 (10) ◽  
Author(s):  
Md. Zahid ◽  
R. Akilan ◽  
T. Ganesh ◽  
R. Mohan Kumar ◽  
G. Chakkaravarthi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Mirror Plane ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Centroid Distance ◽  
Molecular Salt ◽  
Ring Motif

The asymmetric unit of the title molecular salt, C6H10N2 2+·2H2PO3 −, contains half of a benzene-1,2-diaminium cation and a phosphite anion, the complete cation being generated by a crystallographic mirror plane. In the crystal, N—H...O hydrogen bonds generate R 2 2(9) and R 2 2(8) ring motifs and O—H...O hydrogen bonds generate an R 2 2(8) ring motif. Overall, these generate a three-dimensional framework. The crystal structure also features π–π interactions [centroid-to-centroid distance = 3.8642 (7) Å].

scholarly journals (4-Aminosulfonylphenyl)[(2-oxidonaphthalen-1-yl)imino]azanium

IUCrData ◽  
2016 ◽  
Vol 1 (4) ◽  
Author(s):  
A. Benosmane ◽  
D. A. Rouag ◽  
A. Mili ◽  
H. Merazig ◽  
M. A. Benaouida
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Supramolecular Network ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Aromatic Rings ◽  
Compound C ◽  
Π Stacking

The crystal structure of the title compound, C16H13N3O3S, shows that the two independent zwitterions in the asymmetric unit are approximately planar. Intramolecular N—H...O hydrogen bonds occur and the aromatic rings have atransconfiguration with respect to the azo double bond. In the crystal, the molecules are linkedviaN—H...O hydrogen bonds and π–π stacking, forming a three-dimensional supramolecular network, the π–π stacking interactions between adjacent benzene and naphthalene rings having centroid-to-centroid distances of 3.764 (3) and 3.775 (3) Å.

scholarly journals Crystal structure of 2-methyl-4-[(thiophen-2-yl)methylidene]-1,3-oxazol-5(4H)-one

2015 ◽  
Vol 71 (2) ◽  
pp. o123-o124 ◽  
Author(s):  
Preetika Sharma ◽  
K. N. Subbulakshmi ◽  
B. Narayana ◽  
K. Byrappa ◽  
Rajni Kant
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Compound C ◽  
Independent Molecules ◽  
The Individual

The asymmetric unit of the title compound, C9H7NO2S, contains two crystallographically independent molecules (AandB). Both molecules are almost planar [maximum deviations = 0.047 (1) and 0.090 (1) Å, respectively, for the S atoms] with the oxazole and thiophene rings being inclined to one another by 2.65 (16)° in moleculeAand by 4.55 (15)° in moleculeB. In the crystal, the individual molecules are linkedviaC—H...O hydrogen bonds, forming –A–B–A–B– chains along the [10-1] direction. The chains are linkedviaC—H...π and π–π interactions [intercentroid distances = 3.767 (2) and 3.867 (2) Å] involving inversion-related oxazole and thiophene rings in both molecules, forming a three-dimensional structure.

scholarly journals Crystal structure of levomepromazine maleate

2016 ◽  
Vol 72 (5) ◽  
pp. 612-615
Author(s):  
Gyula Tamás Gál ◽  
Nóra Veronika May ◽  
Petra Bombicz
Keyword(s):  
Crystal Structure ◽  
Three Dimensional ◽  
Conformational Flexibility ◽  
Ring System ◽  
Neutral Molecule ◽  
Supramolecular Network ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Methoxy Substituent ◽  
Protonated Molecules

The asymmetric unit of the title salt, C19H25N2OS+·C4H3O4−[systematic name: (S)-3-(2-methoxyphenothiazin-10-yl)-N,N,2-trimethylpropanaminium hydrogen maleate], comprises two (S)-levomepromazine cations and two hydrogen maleate anions. The conformations of the two cations are similar. The major difference relates to the orientation of the methoxy substituent at the phenothiazine ring system. The crystal components form a three-dimensional supramolecular networkviaN—H...O, C—H...O and C—H...π interactions. A comparison of the conformations of the levomepromazine cations with those of the neutral molecule and similar protonated molecules reveals significant conformational flexibility of the phenothiazine ring system and the substituent at the phenothiazine N atom.

scholarly journals 2,5-Dimethylanilinium 4-hydroxybenzoate–2,5-dimethylaniline–4-hydroxybenzoic acid (1/1/1)

IUCrData ◽  
2016 ◽  
Vol 1 (10) ◽  
Author(s):  
A. Mani ◽  
K. Rajesh ◽  
P. Praveen Kumar ◽  
G. Chakkaravarthi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Hydroxybenzoic Acid ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Compound C ◽  
Dimensional Network

The asymmetric unit of the title compound, C8H12N+·C7H5O3 −·C8H11N·C7H6O3, contains a 2,5-dimethylanilinium cation, 4-hydroxybenzoate anion and neutral 2,5-dimethylaniline and 4-hydroxybenzoic acid molecules. The components are connected by N—H...O, O—H...O and N—H...N hydrogen bonds, which generate R 2 2(8), R 4 4(20) and R 4 4(24) loops, as part of a three-dimensional network. The crystal structure also features weak C—H...π interactions.

scholarly journals 2-Aminopyridinium 2,4-dinitrophenolate

IUCrData ◽  
2016 ◽  
Vol 1 (9) ◽  
Author(s):  
S. Reena Devi ◽  
R. Akilan ◽  
R. Mohan Kumar ◽  
T. Ganesh ◽  
G. Chakkaravarthi
Keyword(s):  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Organic Salt ◽  
Supramolecular Network ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Anions And Cations

The asymmetric unit of the title organic salt, C5H7N2+·C6H3N2O5−, comprises two 2-aminopyridinium cations and two 2,4-dinitrophenolate anions. The cations are protonated at the pyridine N atoms, while the anions are deprotonated at hydroxyl O atoms. In the crystal, bifurcated N—H...O hydrogen bonds generate twoR12(6), twoR21(6), and oneR21(4) ring motifs. Adjacent anions and cations are linked by N—H...O hydrogen bonds into infinite chains along [110]. Weak C—H...O contacts and π–π interactions further link the components, forming a complex three-dimensional supramolecular network.

scholarly journals Crystal structure of bis[4-(dimethylamino)pyridinium] bis(2-nitrobenzoate) trihydrate

2014 ◽  
Vol 70 (10) ◽  
pp. 221-223 ◽  
Author(s):  
N. Sivakumar ◽  
S. Muralidharan ◽  
G. Chakkaravarthi ◽  
D. Velmurugan ◽  
G. Anbalagan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Pyridine Ring ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Water Molecules ◽  
Asymmetric Unit ◽  
Three Dimensional Structure ◽  
Π Interactions ◽  
Benzene Rings

The title salt, 2C7H11N2+·2C7H4NO4−·3H2O, crystallized with two anions and two cations in the asymmetric unit, together with three water molecules. Both 4-dimethylaminopyridinium cations are protonated at their pyridine N atoms with the plane of the N(CH3)2hetero atoms inclined to the pyridine ring by 4.5 (2) and 1.4 (2)°. In the 2-nitrobenzoate anions, the carboxyl and nitro groups are inclined to their respective benzene rings by 77.1 (3) and 20.0 (3)°, and 75.8 (2) and 20.9 (3)°. In the crystal, the anions are linkedviaO—H...O hydrogen bonds involving the water molecules, forming chains along [100]. The cations are linked to these chains by N—H...O hydrogen bonds. The chains are linkedviaC—H...O hydrogen bonds and C—H...π and π–π interactions [inter-centroid distances range from 3.617 (1) to 3.851 (1) Å], forming a three-dimensional structure.

scholarly journals Crystal structure of piperazine-1,4-diium bis(4-aminobenzenesulfonate)

2015 ◽  
Vol 71 (12) ◽  
pp. o1084-o1085 ◽  
Author(s):  
K. Sathesh Kumar ◽  
S. Ranjith ◽  
S. Sudhakar ◽  
P. Srinivasan ◽  
M. N. Ponnuswamy
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Chair Conformation ◽  
Asymmetric Unit ◽  
Piperazine Ring ◽  
Π Interactions

The asymmetric unit of the title salt, C4H12N22+·2C6H6NO3S−, consists of half a piperazindiium dication, located about an inversion centre, and a 4-aminobenzenesulfonate anion. The piperazine ring adopts a chair conformation. In the crystal, the cations and anions are linkedviaN—H...O and C—H...O hydrogen bonds, forming a three-dimensional framework. Within the framework there are C—H...π interactions and the N—H...O hydrogen bonds result in the formation ofR44(22) andR34(13) ring motifs.

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