Supramolecular Rhombic Grids Formed from Bimolecular Building Blocks

Abstract

A programmed assembly process produces rhombic grid networks from compounds L1-L4 in the crystal by pi-pi stacking interactions that generate a bimolecular grid synthon, which undergoes further NH...N hydrogen-bond-mediated assembly.

Robust R22(8) hydrogen bonded dimer for crystal engineering of glycoluril derivatives

“…The bond lengths and bond angles in all of the compounds proved similar to those reported previously. [8][9][10][11][12][13] The crystal structure determinations revealed that the angle between the mean planes defined by the five-membered rings was 62.50-65.84°, while the distance between the ureidyl CO⋯OC groups was in the range of 5.674-5.889 Å. Moreover, the cis-fused five-membered rings Scheme 1 Hydrogen bonding motifs of amide groups in glycoluril derivatives.…”

“…12 In our more recent work, a pyridine group was introduced to this supramolecular reaction, after which the structure showed a preference for an amide-pyridine heterosynthon (III) (Scheme 1), leading to the formation of bimolecular rhombic grids with the assistance of π⋯π interactions. 13 Thus, prediction of the crystal structure of this system was still elusive due to the variable hydrogen bonding motif. In this current report, we now describe a highly conserved hydrogen-bonding pattern.…”

Unexpected Formation of Thioglycolurils Precursors

“…In addition, they have found applications as anion‐binding receptors and molecular capsules . In recent years, glycolurils attract attention of organic chemists as molecular templates for intramolecular Claisen‐type condensation and precursors in combinatorial and supramolecular chemistry . Hence, search of the routes to prepare thioanalogues of glycolurils has been a subject of interest in recent decades .…”

Green Synthesis : Crystal Structure and Bioactivity of C-(Psubstituted Phenyl) Calix[4] Resorcinarenes-Dmso Inclusion Complexes

“…Non-covalent intermolecular interactions of multicomponent crystalline compounds are of great interest to chemists due to their wide-range uses and application areas such as energy storage, drug delivery and separation technology. [1] Calix [4]resorcinarenes represent a class of macrocyclic molecules used as potential lattice hosts for different guests. [2] In crystal engineering and supramolecular chemistry, understanding the intermolecular interactions between molecules is very important and crucial to understanding many biological processes.…”