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1. Polymorphism, Halogen Bonding, and Chalcogen Bonding in the Diiodine Adducts of 1,3- and 1,4-Dithiane

   https://doi.org/10.3390/molecules26164985  

   Peloquin, Andrew J.; Alapati, Srikar; McMillen, Colin D.; Hanks, Timothy W.; Pennington, William T. (August 2021, Molecules)

   Through variations in reaction solvent and stoichiometry, a series of S-diiodine adducts of 1,3- and 1,4-dithiane were isolated by direct reaction of the dithianes with molecular diiodine in solution. In the case of 1,3-dithiane, variations in reaction solvent yielded both the equatorial and the axial isomers of S-diiodo-1,3-dithiane, and their solution thermodynamics were further studied via DFT. Additionally, S,S’-bis(diiodo)-1,3-dithiane was also isolated. The 1:1 cocrystal, (1,4-dithiane)·(I2) was further isolated, as well as a new polymorph of S,S’-bis(diiodo)-1,4-dithiane. Each structure showed significant S···I halogen and chalcogen bonding interactions. Further, the product of the diiodine-promoted oxidative addition of acetone to 1,4-dithiane, as well as two new cocrystals of 1,4-dithiane-1,4-dioxide involving hydronium, bromide, and tribromide ions, was isolated. 

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2. Structure and Bonding in π-Stacked Perylenes: The Impact of Charge on Pancake Bonding

   https://doi.org/10.1021/jacs.3c14065  

   Bhattacharjee, Rameswar; Jervis, Henry; McCormack, Megan E.; Petrukhina, Marina A.; Kertesz, Miklos (April 2024, Journal of the American Chemical Society)
3. Characterization of competing halogen-bonding and hydrogen-bonding motifs in the acetonitrile/hydrogen iodide dimer

   https://doi.org/10.1016/j.chemphys.2023.111843  

   Perkins, Morgan A.; Tschumper, Gregory S. (April 2023, Chemical Physics)
4. Versatile Fe–Sn Bonding Interactions in a Metallostannylene System: Multiple Bonding and C–H Bond Activation

   https://doi.org/10.1021/jacs.1c10144  

   Handford, Rex C.; Nesbit, Mark A.; Smith, Patrick W.; Britt, R. David; Tilley, T. Don (January 2022, Journal of the American Chemical Society)
5. Metal→Carbon Dative Bonding

   https://doi.org/10.1002/anie.202201841  

   Litle, Elishua D.; Gabbaï, François P. (April 2022, Angewandte Chemie International Edition)

   Abstract As part of our interest in unusual bonding situations, we are now targeting complexes featuring metal→carbon dative bonds. Here, we report on the formation of such linkages in a series of Group 10 complexes featuring a triarylphosphine ligand functionalized at the γ position by a carbenium ion. Through combined synthetic, spectroscopic, and computational studies, we show that the M→C_carbeniuminteraction present in these complexes scales with the basicity of the donor, confirming its dative nature. 

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