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Search query: supramolecular order
1650 articles match your search "supramolecular order"Results 1 to 10, sorted by relevance:
research papers
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Robustness of supramolecular synthons in the lamotrigine solvates and hydrate has been investigated in order to be applied for the lamotrigine cocrystals design.
CHEMISTRY | CRYSTENG
Open access
An algorithmic strategy to design stoichiometric quaternary and solid-solution quinary solids is described. The strategy involves recognition of structural inequivalences to generate ternary and quaternary cocrystals which can then be extended to five-component solid solutions through matching of suitable interactions.
research papers
Open access
The FeIIIS2N2O2 chromophore of ammonium bis[salicylaldehyde thiosemicarbazonato(2−)]iron(III) contains two O,N,S-donating salicylaldehyde thiosemicarbazonate(2−) ligands in perpendicular planes, with the O and S atoms in cis and the N atoms in trans positions. The FeIII ion is in the low-spin state at 100 K. Systematic twinning by metric pseudomerohedry is explained by application of the order–disorder (OD) theory.
research papers
The novel supramolecular host–guest architectures of cocrystallized 18-crown-6 with isophthalic derivatives, 18-crown-6·6(5-hydroxyisophthalic acid)·10(H2O) and 18-crown-6·2(trimesic acid)·2(H2O), mainly stabilized by O—HO hydrogen bonding and ππ interactions, have been described. Intra- and intermolecular interactions are analyzed and quantified by Hirshfeld surfaces derived from single crystal XRD data.
research communications
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Two new substituted propanedioate esters have been synthesized using a three-component solvent-free thermal reaction. The products, which are isomorphous, differ only in the presence of a bromophenyl group in one, where the molecules are fully ordered, as compared with a chlorophenyl group in the other, where the molecules exhibit two types of disorder.
research papers
Open access
The structures of three distinct forms (cocrystal, salt and a hybrid cocrystal of salt) of multicomponent crystals of imidazole-based drugs (metronidazole, ketoconazole and miconazole) with trithiocyanuric acid as coformer are characterized. Their supramolecular architectures reflect the interplay between different molecular species.
research papers
The structures of three 1:1 cocrystal forms of etoricoxib (ETR) with benzoic acid, 4-fluorobenzoic acid and 4-nitrobenzoic acid were characterized by X-ray diffraction (single crystal and powder) and thermal differential scanning calorimetry–thermogravimetry techniques. Due to the influence of the different acids, ETR shows different conformations.
research communications
Open access
In the crystal structures of the formamide monosolvate (1a) and the n-propanol/water solvate/hydrate (1b), the host molecules adopt similar geometries with an alternating arrangement of the substituents above and below the plane of the central arene ring.
CHEMISTRY | CRYSTENG
Open access
The possibility of converting crystal engineering principles that originate in the organic solid state into productive strategies for the effective supramolecular assembly of coordination complexes has been established through a range of complementary techniques. Calculated molecular electrostatic potentials, in conjunction with a systematic structural study, demonstrate that the existence and structural importance of the key hydrogen-bond interactions are not disrupted by the presence of metal cations and charge-balancing anions.
CHEMISTRY | CRYSTENG
Open access
Supramolecular interactions in the solid state are discussed in the context of crystal engineering. Specific topics include halogen bonding, ambient and non-ambient conditions, isostructurality and polymorphism, and kinetic assembly of coordination polymers.