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1. Transition from covalent to noncovalent bonding between tetrel atoms

   https://doi.org/10.1039/D4CP01598C  

   Scheiner, Steve (June 2024, Physical Chemistry Chemical Physics)

   The strength and nature of the bonding between tetrel (T) atoms in R₂T⋯TR₂is examined by quantum calculations. 

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2. A Biological Take on Halogen Bonding and Other Non‐Classical Non‐Covalent Interactions

   https://doi.org/10.1002/tcr.202100076  

   Czarny, Ryan S.; Ho, Alexander N.; Shing Ho, P. (April 2021, The Chemical Record)

   Abstract Classical hydrogen bonds have, for many decades, been the dominant non‐covalent interaction in the toolbox that chemists and chemical engineers have used to design and control the structures of compounds and molecular assemblies as novel materials. Recently, a set of non‐classical non‐covalent (NC−NC) interactions have emerged that exploit the properties of the Group IV, V, VI, and VII elements of the periodic table (the tetrel, pnictogen, chalcogen, and halogen bonds, respectively). Our research group has been characterizing the prevalence, geometric constraints, and structure‐function relationship specifically of the halogen bond in biological systems. We have been particularly interested in exploiting the biological halogen bonds (or BXBs) to control the structures, stabilities, and activities of biomolecules, including the DNA Holliday junction and enzymes. In this review, we first provide a set of criteria for how to determine whether BXBs or any other NC−NC interactions would have biological relevance. We then navigate the trail of studies that had led us from an initial, very biological question to our current point in the journey to establish BXBs as a tool for biomolecular engineering. Finally, we close with a perspective on future directions for this line of research. 

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3. A comparison of structure, bonding and non-covalent interactions of aryl halide and diarylhalonium halogen-bond donors

   https://doi.org/10.3762/bjoc.20.125  

   Javaly, Nicole; McCormick, Theresa M; Stuart, David R (January 2024, Beilstein Journal of Organic Chemistry)

   Halogen bonding permeates many areas of chemistry. A wide range of halogen-bond donors including neutral, cationic, monovalent, and hypervalent have been developed and studied. In this work we used density functional theory (DFT), natural bond orbital (NBO) theory, and quantum theory of atoms in molecules (QTAIM) to analyze aryl halogen-bond donors that are neutral, cationic, monovalent and hypervalent and in each series we include the halogens Cl, Br, I, and At. Within this diverse set of halogen-bond donors, we have found trends that relate halogen bond length with the van der Waals radii of the halogen and the non-covalent or partial covalency of the halogen bond. We have also developed a model to calculate ΔGof halogen-bond formation by the linear combination of the % p-orbital character on the halogen and energy of the σ-hole on the halogen-bond donor. 

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4. Understanding Non-Covalent Interactions: Correlated Energy Decomposition Analysis and Applications to Halogen Bonding

   https://doi.org/10.2533/chimia.2018.193  

   Gonthier, Jerome F.; Thirman, Jonathan; Head-Gordon, Martin (April 2018, CHIMIA International Journal for Chemistry)
5. Linear Inverse Sandwich Complexes of Tetraanionic Benzene Stabilized by Covalent δ-Bonding with Late Lanthanides

   https://doi.org/10.1021/jacs.4c12278  

   McClain, K_Randall; Vincent, Alexandre_H; Rajabi, Ahmadreza; Ngo, Danh_X; Meihaus, Katie_R; Furche, Filipp; Harvey, Benjamin_G; Long, Jeffrey_R (November 2024, Journal of the American Chemical Society)