Related Experiment Video
Updated: Jan 1, 2026
Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
Predicting the halogen-n (n = 3-6) synthons to form the "windmill" pattern bonding based on the halogen-bonded
Mengyu Liu1, Yanli Zeng1,2, Zheng Sun1
1Institute of Computational Quantum Chemistry, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, People's Republic of China.
Abstract:
The "windmill" pattern cyclic halogen polymers (XBr)3 (X = Cl, Br, I) and (BrY)n (n = 3-6, Y = Cl, Br, I) have been investigated using the density functional theory. Due to the anisotropic distribution of its electron density, the halogen atom can form halogen-bonded interactions by functioning as both electron donor sites and electron acceptor sites. For (XBr)3 (X = Cl, Br, I) trimers, the Cl···Cl interaction is the weakest, and the I···I interaction is the strongest. For (BrY)n (n = 3-6, Y = Cl, Br, I), the Br···Br halogen bonds are the strongest in (BrY)4 tetramers. We predict that the iodine-4 synthon may allow creation of a self-assembled island during crystal growth. The angle formed by the electron-depleted sigma-hole, the halogen atom and the electron-rich equatorial belt perpendicular to the bond direction, together with the halogen-bond angle, can be used to explain the geometries and strength of the halogen-bond interactions. © 2018 Wiley Periodicals, Inc.
More Related Videos
06:44From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
06:35Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Related Concept Videos
03:24Hybridization of Atomic Orbitals I
02:45Valence Bond Theory
02:42Valence Bond Theory
03:35Hybridization of Atomic Orbitals II
03:51Molecular Orbital Theory II
02:38Electrophilic Addition to Alkynes: Halogenation
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.