Results 281 to 290 of about 1,194,003 (337)

Halogen-Bond-Induced Consecutive Csp3-H Aminations via Hydrogen Atom Transfer Relay Strategy.

Organic Letters, 2020
The utilization of a halogen bond in a number of chemical fields is well-known. Surprisingly, the incorporation of this useful noncovalent interaction in chemical reaction engineering is rare. We disclose here an uncommon use of halogen bonding to induce
Fan Wu, J. Ariyarathna, N. Kaur, Nur-E Alom, Maureen L Kennell, Omar H Bassiouni, Wei Li   +6 more
semanticscholar   +1 more source

Competition between a Tetrel and Halogen Bond to a Common Lewis Acid.

Journal of Physical Chemistry A, 2020
The T and X atoms of TF3X (T = C, Si, Ge, Sn; X = Cl, Br, I) can engage in a tetrel or halogen bond, respectively, with an approaching NH3 base. With the exception of T = C, the tetrel bonds are considerably stronger than the halogen bond regardless of ...
S. Scheiner
semanticscholar   +1 more source

Visible Light-Driven Halogen Bond Donor Based Molecular Switches: From Reversible Unwinding to Handedness Inversion in Self-Organized Soft Helical Superstructures.

Angewandte Chemie, 2019
Visible light-driven molecular switches endowing reversible modulation of the functionalities of self-organized soft materials are currently highly sought after for fundamental scientific studies and technological applications.
Hao Wang, H. Bisoyi, Bing-Xiang Li, M. McConney, T. Bunning, Quan Li   +5 more
semanticscholar   +1 more source

Halogen Bond Unlocks Ultra-High Birefringence.

Angewandte Chemie
Anisotropy is crucial for birefringence (Δn) in optical materials, but optimizing it remains a formidable challenge (Δn > 0.3). Supramolecular frameworks incorporating π-conjugated components are promising for achieving enhanced birefringence since their
Jin Chen, Miao-Bin Xu, Huai-Yu Wu, Jun-Yan Wu, Kezhao Du   +4 more
semanticscholar   +1 more source

Oriented External Electric Fields: Tweezers and Catalysts for Reactivity in Halogen-Bond Complexes.

Journal of the American Chemical Society, 2019
This theoretical study establishes ways of controlling and enabling an uncommon chemical reaction, the displacement reaction, B:---(X-Y) → (B-X)+ + :Y-, which is nascent from a B:---(X-Y) halogen bond (XB) by nucleophilic attack of the base, B:, on the ...
Chao Wang, D. Danovich, Hui Chen, S. Shaik   +3 more
semanticscholar   +1 more source

Halogen Bonding Molecular Capsules

Angewandte Chemie International Edition, 2015
AbstractMolecular capsules based solely on the interaction of halogen bonding (XB) are presented along with their host–guest binding properties in solution. The first example of a well‐defined four‐point XB supramolecular system is realized by decorating resorcin[4]arene cavitands with polarized halogen atoms for dimerization with tetra(4‐pyridyl ...
Oliver, Dumele, Nils, Trapp, François, Diederich   +2 more
openaire   +2 more sources

Halogen bonding anion recognition

Chemical Communications, 2016
The development of solution-based anion receptor molecules which exploit halogen bonding interactions is an emerging area of research. ThisFeature Articlereviews recent advances which have been made in this rapidly developing field, surveying the use of iodoperfluoroarene, haloimidazolium and halotriazole/triazolium halogen-bond-donor motifs in anion ...
Asha, Brown, Paul D, Beer
openaire   +2 more sources

Halogen-bonded halogen(I) ion complexes

2023
Halogen bonding occurs between a positive region of a polarized halogen (X), most commonly with an iodine or bromine atom. The polarization, caused by an electron withdrawing group (R), induces electron deficiency onto the halogen atom, creating an electropositive region known as a σ-hole.
Ward, Jas S., Truong, Khai-Nghi, Erdélyi, Mate, Rissanen, Kari   +4 more
openaire   +2 more sources

Synergic Interplay Between Halogen Bond and Hydrogen Bond in the Activation of a Neutral Substrate in a Nanoconfined Space.

Angewandte Chemie, 2020
The principle of the "amplified halogen bonding (XB) in a small space" is here exploited as a catalytic tool for the activation of a XB acceptor substrate in a nanoconfined environment. The inner cavity of the resorcinarene capsule has been equipped with
Pellegrino La Manna, M. De Rosa, Carmen Talotta, A. Rescifina, Giuseppe Floresta, A. Soriente, C. Gaeta, P. Neri   +7 more
semanticscholar   +1 more source

Asymmetric bifurcated halogen bonds

Physical Chemistry Chemical Physics, 2015
Depending on the relative orientation of the halogen-bond donor and acceptor, this bifurcated interaction may be classified as ‘σ-hole – lone pair’ or ‘σ-hole – π’ bonding.
Novák, Martin, Foroutan-Nejad, Cina, Marek, Radek   +2 more
openaire   +2 more sources