Results 181 to 190 of about 3,671 (216)

Supramolecular Synthons and Pattern Recognition

1998
The aims of crystal engineering are the understanding of intermolecular interactions and their application in the design of crystal structures with specific architectures and properties. In general, all types of crystal structures may be considered but this article is limited to organic molecular solids.
Ashwini Nangia, Gautam R. Desiraju
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Gold⋯π aryl interactions as supramolecular synthons

CrystEngComm, 2009
Au⋯π interactions whereby the electron-rich π-system of C6-aromatic rings interact with gold are shown to exist in the crystal structures of both gold(I) and gold(III) complexes, and have been revealed to occur between neutral/neutral, cationic/cationic, and cationic/anionic systems.
Edward R. T. Tiekink, Julio Zukerman-Schpector   +1 more
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Pb···π Aryl Interactions as Supramolecular Synthons

Australian Journal of Chemistry, 2010
A survey of lead (Pb) structures containing Pb···π aryl interactions has been conducted. Such contacts usually lead to zero- or one-dimensional aggregates with rare examples of two- and three-dimensional architectures. The Pb···π aryl interactions are found only in crystal structures containing lead(ii) centres and arise as a result of electron ...
Edward R. T. Tiekink, Julio Zukerman-Schpector   +1 more
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Synthesis of Multitopic Verdazyl Radical Ligands. Paramagnetic Supramolecular Synthons

Organic Letters, 2004
[structure: see text] The syntheses of several verdazyl radical and diradicals containing pyridine-based multitopic coordination sites are described. These compounds were designed to be paramagnetic analogues of oligopyridine metallosupramolecular building blocks.
Robin G, Hicks, Bryan D, Koivisto, Martin T, Lemaire   +2 more
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Supramolecular Synthons: Validation and Ranking of Intermolecular Interaction Energies

Crystal Growth & Design, 2012
Building upon Desiraju’s concept of a supramolecular synthon, we have calculated cohesive energies and thermal stabilities of molecular systems related to the proposed synthons. The method employed is PIXEL, which allows reliable and extensive mapping of intermolecular surfaces. Comparisons with accurate ab initio calculations are included.
J. D. Dunitz, A. Gavezzotti
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Ferrocene based organometallic gelators: a supramolecular synthon approach

Soft Matter, 2011
The supramolecular synthon namely primary ammonium dicarboxylate (PAD) synthon has been exploited to generate a new series of salt based low molecular weight gelators (LMWGs) derived from ferrocenedicarboxylic acid (FDCA) and primary amines Me–(CH2)n–NH2 (n = 3–15).
Pathik Sahoo, Vedavati G. Puranik, A. K. Patra, P. U. Sastry, Parthasarathi Dastidar   +4 more
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Supramolecular Synthons in Bumetanide Cocrystals and Ternary Products

Crystal Growth & Design, 2017
A novel design strategy for cocrystals of the diuretic sulfonamide drug bumetanide (BUM) with carboxamides is reported based on reliable supramolecular synthons. Binary cocrystals of BUM with pyridine carboxamides, pyridones, and cytosine were obtained by solvent-assisted grinding followed by solution crystallization.
Suryanarayana Allu, Geetha Bolla, Srinu Tothadi, Ashwini Nangia   +3 more
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Conserved hydrogen-bonded supramolecular synthons in pyridinium tetrachlorometallates

CrystEngComm, 2004
The crystal and molecular structures of the pyridinium tetrahalometallates, [Hpy]2[CoCl4] and [Etpy]2[CoCl4], have been determined and compared with those of other pyridinium tetrahalometallates and 4,4'-bipyridinium perhalometallates. The pyridinium cation in [Hpy]2[CoCl4] uses its heterocyclic N–H and 4-positioned C–H moieties to form bifurcated ...
Felloni, M, Hubberstey, P, Wilson, C, Schroder, Martin   +3 more
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The Supramolecular Synthon Approach to Crystal Structure Prediction

Crystal Growth & Design, 2002
A new approach has been proposed for the ab initio crystal structure prediction of small organic molecules.
J. A. R. P. Sarma, Gautam R. Desiraju
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A Supramolecular Synthon for H-Bonded Transition Metal Arrays

Inorganic Chemistry, 1999
The heterocycle melamine appended to a 14-membered polyazamacrocyclic copper(II) complex ring exhibits a strong propensity for ordered arrays driven by H-bonding forces. In this work, the X-ray crystal structures of three distinctly different arrays based on the same macrocyclic complex are reported, comprising cocrystals with barbituric acid (a sheet ...
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