Structural characterization, gelation ability, and energy-framework analysis of two bis(long-chain ester)-substituted 4,4′-biphenyl compounds

2017 ◽  
Vol 73 (10) ◽  
pp. 791-796 ◽  
Author(s):  
David K. Geiger ◽  
H. Cristina Geiger ◽  
Shawn M. Moore ◽  
William R. Roberts
Keyword(s):  
Self Assembly ◽  
Noncovalent Interactions ◽  
Three Dimensional ◽  
Framework Analysis ◽  
Dimensional Network ◽  
Dispersion Component ◽  
Structure Determinations ◽  
Phenyl Rings ◽  
Alcohol Solvents ◽  
Solid State Structures

There are few examples of single-crystal structure determinations of gelators, as gel formation requires that the dissolved gelator self-assemble into a three-dimensional network structure incorporating solvent via noncovalent interactions rather than self-assembly followed by crystallization. In the solid-state structures of the isostructural compounds 4,4′-bis[5-(methoxycarbonyl)pentyloxy]biphenyl (BBO6-Me), C26H34O6, and 4,4′-bis[5-(ethoxycarbonyl)pentyloxy]biphenyl (BBO6-Et), C28H38O6, the molecules sit on a crystallographically imposed center of symmetry, resulting in strictly coplanar phenyl rings. BBO6-Me behaves as an organogelator in various alcohol solvents, whereas BBO6-Et does not. The extended structure reveals bundles of molecules that form a columnar superstructure. Framework-energy calculations reveal much stronger interaction energies within the columns (−52 to −78 kJ mol−1) than between columns (−2 to −16 kJ mol−1). The intracolumnar interactions are dominated by a dispersion component, whereas the intercolumnar interactions have a substantial electrostatic component.

Two- and Three-Dimensional Network of Nanoparticles via Polymer-Mediated Self-Assembly

2012 ◽  
Vol 1 (3) ◽  
pp. 396-399 ◽  
Author(s):  
Mottakin M. Abul Kashem ◽  
Debabrata Patra ◽  
Jan Perlich ◽  
André Rothkirch ◽  
Adeline Buffet ◽  
...  
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Dimensional Network

scholarly journals 4-Fluoro-N-(4-hydroxybenzylidene)aniline

2014 ◽  
Vol 70 (8) ◽  
pp. o860-o860
Author(s):  
L. Jothi ◽  
G. Anuradha ◽  
G. Vasuki ◽  
R. Ramesh Babu ◽  
K. Ramamurthi
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Schiff Bases ◽  
Title Compound ◽  
Three Dimensional ◽  
Dihedral Angles ◽  
Axis Direction ◽  
Compound C ◽  
Dimensional Network ◽  
Phenyl Rings

In the title compound, C13H10FNO, the benzene ring planes are inclined at an angle of 50.52 (8)°. A characteristic of aromatic Schiff bases withN-aryl substituents is that the terminal phenyl rings are twisted relative to the plane of the HC=N link between them. In this case, the HC=N unit makes dihedral angles of 10.6 (2) and 40.5 (2)° with the hydroxybenzene and flurobenzene rings, respectively. In the crystal, O—H...N and C—H...F hydrogen bonds lead to the formation of chains along thec-andb-axis directions, respectively. C—H...π contacts link molecules alongaand these contacts combine to generate a three-dimensional network with molecules stacked along theb-axis direction.

scholarly journals Diethyl 4-(biphenyl-4-yl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate

2014 ◽  
Vol 70 (7) ◽  
pp. o791-o792 ◽  
Author(s):  
Scott A. Steiger ◽  
Anthony J. Monacelli ◽  
Chun Li ◽  
Janet L. Hunting ◽  
Nicholas R. Natale
Keyword(s):  
Hydrogen Bonds ◽  
Intermolecular Interaction ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Three Dimensional ◽  
Compound C ◽  
Dimensional Network ◽  
Phenyl Rings ◽  
Dihydropyridine Ring

The title compound, C25H27NO4, has a flattened dihydropyridine ring. The benzene and phenyl rings are synclinal to one another, forming a dihedral angle of 49.82 (8)°; the axis of the biphenyl rings makes an 81.05 (9)° angle to the plane of the dihydropyridine ring. In the crystal, N—H...O hydrogen bonds link the molecules into chain motifs running along thea-axis direction. The chains are cross-linked by C—H...O interactions, forming sheet motifs running slightly off the (110) plane, together with an intermolecular interaction between head-to tail biphenyl groups, thus making the whole crystal packing a three-dimensional network. Intramolecular C—H...O hydrogen bonds are also observed.

scholarly journals Crystal structure of (1,4-diphenyl-4H-1,2,4-triazol-3-yl)phenylamine difluorophosphate, and a survey of the difluorophosphate anion (PO2F2 −)

2020 ◽  
Vol 76 (7) ◽  
pp. 1003-1006
Author(s):  
Matthias Weil ◽  
Markus Fürst
Keyword(s):  
Crystal Structure ◽  
Three Dimensional ◽  
Triazole Ring ◽  
Nitrate Anion ◽  
Gravimetric Analysis ◽  
Triazole Derivative ◽  
Dimensional Network ◽  
Phenyl Rings ◽  
Metal Organic ◽  
Analytical Reagent

Nitron is the trivial name of (1,4-diphenyl-4H-1,2,4-triazol-3-yl)phenylamine (C20H16N4), a triazole derivative used as an analytical reagent for gravimetric analysis of the nitrate anion. The crystal structure of the difluorophosphate salt of Nitron, 3-anilino-1,4-diphenyl-1H-1,2,4-triazol-4-ium difluorophosphate, C20H17N4 +·PO2F2 −, is reported here. Within the protonated Nitron molecule, the triazole ring, one of the phenyl rings and the NHPh moiety are virtually co-planar, with the third phenyl ring inclined to the least-squares plane of the other three rings by 56.07 (3)°. Intermolecular N—H...O and C—H...O hydrogen bonds between cations and difluorophosphate anions lead to the formation of a three-dimensional network that is consolidated by additional π–π stacking interactions between the triazole ring and one of the phenyl rings. Database surveys on inorganic, metal–organic and organic structures comprising the tetrahedral PO2F2 group reveal mean bond lengths of P—O = 1.459 (27) Å, P—F = 1.530 (21) Å, and angles of O—P—O = 121.2 (2.9)°, O—P—F = 108.7 (6)°, and F—P—F = 98.5 (2.6)°, using a dataset of 67 independent PO2F2 − anions or PO2F2 entities.

scholarly journals (E)-2-Phenyl-N-(thiophen-2-ylmethylidene)imidazo[1,2-a]pyridin-3-amine

IUCrData ◽  
2016 ◽  
Vol 1 (5) ◽  
Author(s):  
Abdelmalik Elaatiaoui ◽  
Fouad Elkalai ◽  
Noureddine Benchat ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Three Dimensional ◽  
Ring System ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
Dimensional Network ◽  
Fused Ring ◽  
Phenyl Rings ◽  
The Mean ◽  
Fused Ring System

The asymmetric unit of the title compound, C18H13N3S, is build up from two independent molecules slightly inclined to each other. In each molecule, the imidazo[1,2-a]pyridine ring system is almost planar, with the largest deviation from the mean plane being 0.022 (1) Å in the first molecule and 0.018 (1) Å in the second molecule. The fused-ring system belonging to the first molecule makes dihedral angles of 24.06 (7) and 40.52 (8)° with the thiophenyl and phenyl rings, respectively. The corresponding values observed in the second molecule are nearly the same, namely 25.20 (7) and 38.99 (7)°, respectively. The dihedral angle between the thiophenyl and phenyl rings is 63.47 (9)° in the first molecule and 47.49 (9)° in the second. The cohesion of the crystal structure is ensured by two C—H...N hydrogen bonds between molecules and by three C—H...π interactions, forming a three-dimensional network.

scholarly journals 3-(2,5-Dichlorothiophen-3-yl)-5-(2,4-dimethoxyphenyl)-1-methyl-4,5-dihydro-1H-pyrazole

IUCrData ◽  
2019 ◽  
Vol 4 (7) ◽  
Author(s):  
Mohammad M. Ibrahim ◽  
Mahmoud Al-Refai ◽  
Basem F. Ali ◽  
Armin Geyer ◽  
Klaus Harms ◽  
...  
Keyword(s):  
Title Compound ◽  
Phenyl Ring ◽  
Three Dimensional ◽  
Pyrazole Ring ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Envelope Conformation ◽  
Compound C ◽  
Dimensional Network ◽  
Phenyl Rings

In the title compound, C16H16Cl2N2O2S, the pyrazole ring has an envelope conformation with the C atom bearing the phenyl ring being the flap. The dihedral angles between the central pyrazole ring (all atoms) and pendant thiophene and phenyl rings are 2.00 (14) and 81.49 (12)°, respectively. In the crystal, weak C—H...O, Cl...π and π–π stacking interactions link the molecules into a three-dimensional network.

scholarly journals Crystal structure and Hirshfeld surface analysis of 3-amino-1-oxo-2,6,8-triphenyl-1,2,7,8-tetrahydroisoquinoline-4-carbonitrile

2021 ◽  
Vol 77 (2) ◽  
pp. 195-199
Author(s):  
Farid N. Naghiyev ◽  
Maria M. Grishina ◽  
Victor N. Khrustalev ◽  
Ali N. Khalilov ◽  
Mehmet Akkurt ◽  
...  
Keyword(s):  
Surface Analysis ◽  
Crystal Packing ◽  
Three Dimensional ◽  
Ring System ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Boat Conformation ◽  
Compound C ◽  
Dimensional Network ◽  
Phenyl Rings

In the title compound, C28H21N3O, the 1,2-dihydropyridine ring of the 1,2,7,8-tetrahydroisoquinoline ring system is planar as expected, while the cyclohexa-1,3-diene ring has a twist-boat conformation, with Cremer–Pople parameters Q T = 0.367 (2) A, θ = 117.3 (3)° and φ = 327.3 (4)°. The dihedral angles between the best planes through the isoquinoline ring system and the three phenyl rings are 81.69 (12), 82.45 (11) and 47.36 (10)°. In the crystal, molecules are linked via N—H...O and C—H...N hydrogen bonds, forming a three-dimensional network. Furthermore, the crystal packing is dominated by C—H...π bonds with a strong interaction involving the phenyl H atoms. The role of the intermolecular interactions in the crystal packing was clarified using Hirshfeld surface analysis, and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (46.0%), C...H/H...C (35.1%) and N...H/H...N (10.5%) contacts.

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