Clues from cocrystals: A ternary solid, polymorphism, and rare supramolecular isomerism involving resveratrol and 5-fluorouracil

2021 ◽  
Author(s):  
Celymar Ortiz-de Leon ◽  
Len R MacGillivray
Keyword(s):  
Supramolecular Isomerism

We describe a supramolecular synthesis of a ternary cocrystal involving resveratrol and 5-fluorouracil (5-fu) with trans-bis(4-pyridyl)ethylene (bpe). We also have discovered a polymorph of a binary cocrystal involving on 5-fu...

Syntheses, structures and gas sorption properties of two coordination polymers with a unique type of supramolecular isomerism

2015 ◽  
Vol 2 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Xiao-Lin Qi ◽  
Jia-Wen Ye ◽  
Rui-Biao Lin ◽  
Pei-Qin Liao ◽  
Si-Yang Liu ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Structural Difference ◽  
Sorption Properties ◽  
Gas Sorption ◽  
Unique Type ◽  
Supramolecular Isomerism ◽  
Porous Properties

Two genuine supramolecular isomers with a unique type of structural difference and completely different porous properties have been synthesized and characterized.

scholarly journals Structural Versatility and Supramolecular Isomerism in Redox-Active Tetra- and Hexaruthenium Macrocycles

2020 ◽  
Vol 2020 (29) ◽  
pp. 2816-2829 ◽  
Author(s):  
Daniel Fink ◽  
Nicole Orth ◽  
Michael Linseis ◽  
Ivana Ivanović-Burmazović ◽  
Rainer F. Winter
Keyword(s):  
Supramolecular Isomerism ◽  
Redox Active ◽  
Structural Versatility

Square-grid coordination networks of (5,10,15,20-tetra-4-pyridylporphyrinato)zinc(II) in its clathrate with two guest molecules of 1,2-dichlorobenzene: supramolecular isomerism of the porphyrin self-assembly

2009 ◽  
Vol 65 (3) ◽  
pp. m139-m142 ◽  
Author(s):  
Rajesh Koner ◽  
Israel Goldberg
Keyword(s):  
Self Assembly ◽  
Metal Ion ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Coordination Networks ◽  
Guest Molecules ◽  
Square Grid ◽  
Supramolecular Isomerism ◽  
Self Assembled ◽  
Solvent Molecules

The title compound, (5,10,15,20-tetra-4-pyridylporphyrinato)zinc(II) 1,2-dichlorobenzene disolvate, [Zn(C40H24N8)]·2C6H4Cl2, contains a clathrate-type structure. It is composed of two-dimensional square-grid coordination networks of the self-assembled porphyrin moiety, which are stacked one on top of the other in a parallel manner. The interporphyrin cavities of the overlapping networks combine into channel voids accommodated by the dichlorobenzene solvent. Molecules of the porphyrin complex are located on crystallographic inversion centres. The observed two-dimensional assembly mode of the porphyrin units represents a supramolecular isomer of the unique three-dimensional coordination frameworks of the same porphyrin building block observed earlier. The significance of this study lies in the discovery of an additional supramolecular isomer of the rarely observed structures of metalloporphyrins self-assembled directly into extended coordination polymers without the use of external ligand or metal ion auxiliaries.

Polymorphs of phenazine hexacyanoferrate(II) hydrate: supramolecular isomerism in a 2D hydrogen-bonded network

2021 ◽  
Vol 77 (2) ◽  
pp. 211-218
Author(s):  
Ivica Cvrtila ◽  
Vladimir Stilinović
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
The Other ◽  
Two Dimensional ◽  
Structural Motifs ◽  
Supramolecular Isomerism ◽  
Other Hand ◽  
Π Stacking ◽  
Hydrogen Bonded

The crystal structures of two polymorphs of a phenazine hexacyanoferrate(II) salt/cocrystal, with the formula (Hphen)3[H2Fe(CN)6][H3Fe(CN)6]·2(phen)·2H2O, are reported. The polymorphs are comprised of (Hphen)2[H2Fe(CN)6] trimers and (Hphen)[(phen)2(H2O)2][H3Fe(CN)6] hexamers connected into two-dimensional (2D) hydrogen-bonded networks through strong hydrogen bonds between the [H2Fe(CN)6]2− and [H3Fe(CN)6]− anions. The layers are further connected by hydrogen bonds, as well as through π–π stacking of phenazine moieties. Aside from the identical 2D hydrogen-bonded networks, the two polymorphs share phenazine stacks comprising both protonated and neutral phenazine molecules. On the other hand, the polymorphs differ in the conformation, placement and orientation of the hydrogen-bonded trimers and hexamers within the hydrogen-bonded networks, which leads to different packing of the hydrogen-bonded layers, as well as to different hydrogen bonding between the layers. Thus, aside from an exceptional number of symmetry-independent units (nine in total), these two polymorphs show how robust structural motifs, such as charge-assisted hydrogen bonding or π-stacking, allow for different arrangements of the supramolecular units, resulting in polymorphism.

Supramolecular isomerism of self-complementary zinc-5,10,15,20-tetra(4-pyridyl)porphyrin in the presence of dimethylformamide

CrystEngComm ◽  
2010 ◽  
Vol 12 (2) ◽  
pp. 387-394 ◽  
Author(s):  
Rüdiger W. Seidel ◽  
Richard Goddard ◽  
Kirsten Föcker ◽  
Iris M. Oppel
Keyword(s):  
Supramolecular Isomerism

Supramolecular Isomerism of 2,2′‐Bipyrazine Complexes with cis ‐(NH 3 ) 2 Pt II : Ligand Rotational State and Sequential Orientation Determine the 3D Shape of Metallacycles

2011 ◽  
Vol 17 (38) ◽  
pp. 10771-10780 ◽  
Author(s):  
Anzhela Galstyan ◽  
Wei‐Zheng Shen ◽  
Eva Freisinger ◽  
Hussein Alkam ◽  
Wolf Hiller ◽  
...  
Keyword(s):  
Rotational State ◽  
3D Shape ◽  
Supramolecular Isomerism
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