Halogen containing clusters N2Br2, N2Br4, S2Br4and S2Br6yield penannular inclusion compounds

Alshahateet, Solhe F.; Bhadbhade, Mohan; Bishop, Roger; Craig, Donald C.; Scudder, Marcia L.

doi:10.1039/c5ce01838b

Cited by 3 publications

(3 citation statements)

References 49 publications

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“…The principal types of face–face interaction observed in the crystal structures of our V-shaped diquinoline molecules − are shown diagrammatically in Figure . Endo , endo -facial assembly Type I is very common.…”

Section: Results and Discussionmentioning

confidence: 99%

“…In particular, tilting can cause a switch from bimolecular to multimolecular assembly by subtending attractive forces from both faces of the aromatic ring. This data analysis was derived from our collection of diquinoline X-ray crystal structures. ,− However, the various crystallographic databases catalogue many tens of thousands of additional aromatic assemblies. Swivel and tilt interactions play significant roles throughout these wider groups of materials including, for example, DNA stacking, unfolding, and intercalation. − …”

Section: Discussionmentioning

confidence: 99%

“…Structural properties are frequently investigated by utilizing compilations of crystallographic information. − Our studies on diquinoline inclusion hosts , have generated over a hundred crystal structure determinations. Analysis of these data has enabled systematic crystal engineering studies of interactions weaker than the Pauling hydrogen bond to be carried out successfully. − Figure illustrates the generic design of these compounds. The central aliphatic ring provides C 2 or pseudo- C 2 symmetry and a small amount of conformational flexibility to help accommodate guests of varied size.…”

Section: Introductionmentioning

confidence: 99%

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Swivel and Tilt Interactions: Directional Change in Aromatic π···π Crystal Packing

Bishop

Bhadbhade

Scudder

et al. 2018

Crystal Growth & Design

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Offset interfacial π•••π overlap between two aromatic groups of unequal length and breadth often occurs with unidirectional alignment of their molecular long axes. However, π•••π interaction can also occur with directional change. Analysis of diquinoline crystal structure data reveals π•••π swivel angles from 0°(antiparallel alignment) through to 180°( parallel long axes). Swivel angles in the range 0−35°are commonplace and are compatible with the formation of linear and layer assemblies. Larger swivel angle values are less frequent, and their appearance is encouraged through competition with other weak attractive forces. These higher angular values are associated with formation of zigzag chains, corrugated layers, unusual building blocks, homochiral assemblies, and other less common crystal packing modes. Directional change also occurs in structures where the planes of the interacting π-systems are nonparallel, and the consequences of these tilt angles are described. The principles described herein are applicable to aromatic systems in general.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Swivel and Tilt Interactions: Directional Change in Aromatic π···π Crystal Packing

Bishop

Bhadbhade

Scudder

et al. 2018

Crystal Growth & Design

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A facile approach for the synthesis of indenoimidazole derivatives and their supramolecular study

et al. 2016

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The structures of the title Indeno-imidazole compounds, have been determined by FTIR, NMR, mass and single crystal X-ray diffraction. 3a,8a-Dihydroxy-1-phenyl-1,3,3a,8a-tetrahydro-indeno[1,2d]imidazole-2,8-dione (1) crystallizes in the monoclinic, space group P2 1 /c with a = 12.0913(7) Å, b = 5.7204(3) Å, c = 19.8168(11) Å, α = 90.00 • , β = 103.6650(10) • , γ = 90.00 • , V = 1331.87(13) Å 3 , Z = 4; while 3a,8a-Dihydroxy-1-phenyl-2-thioxo-2,3,3a,8a-tetrahydro-1H-indeno[1,2-d]imidazol-8-one (2) crystallizes in the monoclinic, space group P2 1 /c with a = 11.0101(5) Å, b = 6.8421(3) Å, c = 21.1243(9) Å, α = 90.00 • , β = 110.771(2) • , γ = 90.00 • , V = 1487.91(11) Å 3 , Z = 4. Solid-state crystal structures of compounds 1 and 2 are presented here in terms of crystal engineering and supramolecular chemistry. Replacement of oxygen atom of compound 1 by sulfur atom in compound 2 forced compound 2 to hold water molecules and formed the hydrated form.

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Weak Intermolecular Forces, but High Melting Points

et al. 2017

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Halogen containing clusters N₂Br₂, N₂Br₄, S₂Br₄and S₂Br₆yield penannular inclusion compounds

Cited by 3 publications

References 49 publications

Swivel and Tilt Interactions: Directional Change in Aromatic π···π Crystal Packing

Swivel and Tilt Interactions: Directional Change in Aromatic π···π Crystal Packing

A facile approach for the synthesis of indenoimidazole derivatives and their supramolecular study

Weak Intermolecular Forces, but High Melting Points

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