scholarly journals Versatile supramolecular reactivity of zinc-tetra(4-pyridyl)porphyrin in crystalline solids: Polymeric grids with zinc dichloride and hydrogen-bonded networks with mellitic acid

2009 ◽  
Vol 5 ◽  
Author(s):  
Sophia Lipstman ◽  
Israel Goldberg
Keyword(s):  
Supramolecular Chemistry ◽  
Crystal Engineering ◽  
Building Block ◽  
Crystalline Solids ◽  
Unique Combination ◽  
Engineering Studies ◽  
Mellitic Acid ◽  
Hydrogen Bonded

Crystal engineering studies confirm that the zinc-tetra(4-pyridyl)porphyrin building block reveals versatile supramolecular chemistry. In this work, it was found to be reactive in the assembly of both (a) a 2D polymeric array by a unique combination of self-coordination and coordination through external zinc dichloride linkers and (b) an extended heteromolecular hydrogen-bonded network with mellitic acid sustained by multiple connectivity between the component species.

Concomitant polymorphs of 1,3-bis(3-fluorophenyl)urea

2016 ◽  
Vol 72 (9) ◽  
pp. 692-696 ◽  
Author(s):  
Christina A. Capacci-Daniel ◽  
Jeffery A. Bertke ◽  
Shoaleh Dehghan ◽  
Rupa Hiremath-Darji ◽  
Jennifer A. Swift
Keyword(s):  
Hydrogen Bonding ◽  
Crystal Engineering ◽  
Structural Motif ◽  
Parallel Orientation ◽  
One Dimensional ◽  
Monoclinic Form ◽  
Engineering Studies ◽  
Hydrogen Bonded

Hydrogen bonding between urea functionalities is a common structural motif employed in crystal-engineering studies. Crystallization of 1,3-bis(3-fluorophenyl)urea, C13H10F2N2O, from many solvents yielded concomitant mixtures of at least two polymorphs. In the monoclinic form, one-dimensional chains of hydrogen-bonded urea molecules align in an antiparallel orientation, as is typical of many diphenylureas. In the orthorhombic form, one-dimensional chains of hydrogen-bonded urea molecules have a parallel orientation rarely observed in symmetrically substituted diphenylureas.

The Oxamate Anion:  A Flexible Building Block of Hydrogen-Bonded Architectures for Crystal Engineering

1996 ◽  
Vol 118 (42) ◽  
pp. 10134-10140 ◽  
Author(s):  
Christer B. Aakeröy ◽  
Deirdre P. Hughes ◽  
Mark Nieuwenhuyzen
Keyword(s):  
Crystal Engineering ◽  
Building Block ◽  
Hydrogen Bonded

Hydrogen-bonded networks in crystals built from bis(biguanides) and their salts

2006 ◽  
Vol 84 (10) ◽  
pp. 1426-1433 ◽  
Author(s):  
Olivier Lebel ◽  
Thierry Maris ◽  
James D Wuest
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Supramolecular Chemistry ◽  
Crystal Engineering ◽  
Noncovalent Interaction ◽  
Coulombic Repulsion ◽  
Planar Conformation ◽  
Intramolecular Hydrogen ◽  
Hydrogen Bonded

Biguanide groups and biguanidinium cations incorporate multiple sites that can donate or accept hydrogen bonds. To assess their ability to associate and to direct the formation of extended hydrogen-bonded networks, we examined the structure of crystals of four compounds in which two neutral biguanide groups or the corresponding cations are attached to the 1,4- and 1,3-positions of phenylene spacers. As expected, all four structures incorporate extensive networks of hydrogen bonds and reveal other reliable features. In particular, (1) neutral biguanide groups favor a roughly planar conformation with an intramolecular hydrogen bond, and they associate as hydrogen-bonded pairs, (2) despite coulombic repulsion, biguanidinium cations can also associate as hydrogen-bonded pairs, and (3) the 1,3-phenylenebis(biguanidinium) dication favors a pincerlike conformation that allows chelation of suitable counterions. However, the precise patterns of hydrogen bonding in the structures vary substantially, limiting the usefulness of biguanide and biguanidinium as groups for directing supramolecular assembly.Key words: bis(biguanide), bis(biguanidinium), structure, hydrogen-bonded network, noncovalent interaction, supramolecular chemistry, crystal engineering.

scholarly journals Unusual co-crystal of isonicotinamide: the structural landscape in crystal engineering

2012 ◽  
Vol 370 (1969) ◽  
pp. 2900-2915 ◽  
Author(s):  
Srinu Tothadi ◽  
Gautam R. Desiraju
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Crystal Engineering ◽  
Organic Molecule ◽  
Reference Molecule ◽  
Hydrogen Bonded

The idea of a structural landscape is based on the fact that a large number of crystal structures can be associated with a particular organic molecule. Taken together, all these structures constitute the landscape. The landscape includes polymorphs, pseudopolymorphs and solvates. Under certain circumstances, it may also include multi-component crystals (or co-crystals) that contain the reference molecule as one of the components. Under still other circumstances, the landscape may include the crystal structures of molecules that are closely related to the reference molecule. The idea of a landscape is to facilitate the understanding of the process of crystallization. It includes all minima that can, in principle, be accessed by the molecule in question as it traverses the path from solution to the crystal. Isonicotinamide is a molecule that is known to form many co-crystals. We report here a 2:1 co-crystal of this amide with 3,5-dinitrobenzoic acid, wherein an unusual N−H⋯N hydrogen-bonded pattern is observed. This crystal structure offers some hints about the recognition processes between molecules that might be implicated during crystallization. Also included is a review of other recent results that illustrate the concept of the structural landscape.

Supramolecular chemistry and crystal engineering

2005 ◽  
Vol 46 (S1) ◽  
pp. S1-S8 ◽  
Author(s):  
D. V. Soldatov ◽  
I. S. Terekhova
Keyword(s):  
Supramolecular Chemistry ◽  
Crystal Engineering

ChemInform Abstract: A Versatile Di(8-hydroxyquinoline) Building Block for Supramolecular as well as Metallo-Supramolecular Chemistry.

ChemInform ◽  
2010 ◽  
Vol 30 (39) ◽  
pp. no-no
Author(s):  
Markus Albrecht ◽  
Oliver Blau ◽  
Elina Wegelius ◽  
Kari Rissanen
Keyword(s):  
Supramolecular Chemistry ◽  
Building Block
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