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Although uncoordinated benzene forms only C\u2212H\u22c5\u22c5\u22c5anion interactions, and hexafluorobenzene forms only anion\u2010\u03c0 interactions, aromatic ligands in half\u2010sandwich compounds can form both types of interactions, because their entire electrostatic potential surface is positive. These aromatic ligands can form stronger anion\u2010\u03c0 interactions than organic aromatic molecules, as a consequence of more pronounced dispersion and induction energy components. Moreover, C\u2212H\u22c5\u22c5\u22c5anion interactions of aromatic ligands are stronger than anion\u2010\u03c0 interactions, and significantly stronger than C\u2212H\u22c5\u22c5\u22c5anion interactions of benzene. Our study shows that transition\u2010metal coordination can make aromatic moieties suitable for strong interactions with anions, and gives insight into the design of new anion receptors.<\/jats:p>","DOI":"10.1002\/chem.202102896","type":"journal-article","created":{"date-parts":[[2021,10,31]],"date-time":"2021-10-31T23:31:08Z","timestamp":1635723068000},"page":"17862-17872","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["New Type of Aromatic \u03c0\u2010Systems for Anion Recognition: Strong Anion\u2010\u03c0 and C\u2212H\u22c5\u22c5\u22c5Anion Interactions Between Halides and Aromatic Ligands in Half\u2010Sandwich Compounds"],"prefix":"10.1002","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3060-3377","authenticated-orcid":false,"given":"Du\u0161an P.","family":"Malenov","sequence":"first","affiliation":[{"name":"Faculty of Chemistry University of Belgrade  Studentski trg 12\u201316 11000 Belgrade 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