Results 31 to 40 of about 68,472 (270)

Comparison of Bifurcated Halogen with Hydrogen Bonds

open access: yesMolecules, 2021
Bifurcated halogen bonds are constructed with FBr and FI as Lewis acids, paired with NH3 and NCH bases. The first type considered places two bases together with a single acid, while the reverse case of two acids sharing a single base constitutes the ...
Steve Scheiner
doaj   +1 more source

Toward a uniform description of hydrogen bond and halogen bond: correlations of interaction energies with various geometric, electronic and topological parameters [PDF]

open access: yes, 2017
Correlations between interaction energies and various structural parameters were established to reveal the differences between hydrogen bonds and halogen bonds.
Hu, Gui-Xiang   +3 more
core   +1 more source

Competition between Halogen, Hydrogen and Dihydrogen Bonding in Brominated Carboranes [PDF]

open access: yes, 2016
Halogen bonds are a subset of noncovalent interactions with rapidly expanding applications in materials and medicinal chemistry. While halogen bonding is well known in organic compounds, it is new in the field of boron cluster chemistry.
Allen   +31 more
core   +2 more sources

Crystal structure of 7,8-dichloro-4-oxo-4H-chromene-3-carbaldehyde

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C10H4Cl2O3, a dichlorinated 3-formylchromone derivative, the fused-ring system is slightly puckered [dihedral angle between the benzene and pyran rings = 3.66 (10)°].
Yoshinobu Ishikawa
doaj   +1 more source

Halogen Bonds Fabricate 2D Molecular Self-Assembled Nanostructures by Scanning Tunneling Microscopy

open access: yesCrystals, 2020
Halogen bonds are currently new noncovalent interactions due to their moderate strength and high directionality, which are widely investigated in crystal engineering.
Yi Wang, Xinrui Miao, Wenli Deng
doaj   +1 more source

The Halogen Bond in the Design of Functional Supramolecular Materials: Recent Advances [PDF]

open access: yes, 2013
Halogen bonding is an emerging noncovalent interaction for constructing supramolecular assemblies. Though similar to the more familiar hydrogen bonding, four primary differences between these two interactions make halogen bonding a unique tool for ...
A. Priimagi   +3 more
core   +1 more source

π covalency in the halogen bond

open access: yesNature Communications, 2020
Current models of halogen bonding describe the σ-symmetric component of this interaction but do not contemplate the possibility of π-covalency. Here the authors provide experimental and computational evidence of π-covalency in halogen bonds involving ...
Cameron W. Kellett   +2 more
doaj   +1 more source

Hierarchical Self-Assembly of Halogen-Bonded Block Copolymer Complexes into Upright Cylindrical Domains [PDF]

open access: yes, 2017
Self-assembly of block copolymers into well-defined, ordered arrangements of chemically distinct domains is a reliable strategy for preparing tailored nanostructures.
Cavallo G.   +10 more
core   +1 more source

Astatine Facing Janus: Halogen Bonding vs. Charge-Shift Bonding

open access: yesMolecules, 2021
The nature of halogen-bond interactions was scrutinized from the perspective of astatine, potentially the strongest halogen-bond donor atom. In addition to its remarkable electronic properties (e.g., its higher aromaticity compared to benzene), C6At6 can
Serigne Sarr   +4 more
doaj   +1 more source

Halogen-Bonded Co-Crystals of Aromatic N-oxides: Polydentate Acceptors for Halogen and Hydrogen Bonds

open access: yesCrystals, 2017
Seventeen new halogen-bonded co-crystals characterized by single crystal X-ray analysis are presented from 8 × 4 combinations using methyl-substituted pyridine N-oxides and 1,ω-diiodoperfluoroalkanes. The N−O group in six of 17 co-crystals is monodentate
Rakesh Puttreddy   +3 more
doaj   +1 more source

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