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The binding of trifluoroacetate, tetrachloroaurate, tetraphenylborate, perrhenate, and pertechnetate anions in the solid state is regarded. All the anions interact with selenodiazolium cations exclusively via a pair of \u201cchelating\u201d Se\u22efO and H\u22efO non-covalent interactions, which make them an attractive, novel, non-classical supramolecular recognition unit or a synthon. Trifluoroacetate salts were conveniently generated via novel oxidation reaction of 2,2\u2032-dipyridyl diselenide with bis(trifluoroacetoxy)iodo)benzene in the presence of corresponding nitriles. Isolation and structural characterization of transient 2-pyridylselenyl trifluoroacetate was achieved. X-ray analysis has demonstrated that the latter forms dimers in the solid state featuring very short and strong Se\u22efO and Se\u22efN ChB contacts. 1,2,4-Selenodiazolium trifluoroacetates or halides show good solubility in water. In contrast, (AuCl4)\u2212, (ReO4)\u2212, or (TcO4)\u2212 derivatives immediately precipitate from aqueous solutions. Structural features of these supramolecular complexes in the solid state are discussed. The nature and energies of the non-covalent interactions in novel assembles were studied by the theoretical methods. To the best of our knowledge, this is the first study that regards perrhenate and pertechnetate as acceptors in ChB interactions. The results presented here will be useful for further developments in anion recognition and precipitation involving cationic 1,2,4-selenodiazoles.<\/jats:p>","DOI":"10.3390\/ijms23126372","type":"journal-article","created":{"date-parts":[[2022,6,10]],"date-time":"2022-06-10T02:25:33Z","timestamp":1654827933000},"page":"6372","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":33,"title":["Towards Anion Recognition and Precipitation with Water-Soluble 1,2,4-Selenodiazolium Salts: Combined Structural and Theoretical Study"],"prefix":"10.3390","volume":"23","author":[{"given":"Alexey A.","family":"Artemjev","sequence":"first","affiliation":[{"name":"Research Institute of Chemistry, Peoples\u2019 Friendship University of Russia, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5430-0955","authenticated-orcid":false,"given":"Anton P.","family":"Novikov","sequence":"additional","affiliation":[{"name":"Research Institute of Chemistry, Peoples\u2019 Friendship University of Russia, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia"},{"name":"Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Bldg 4, Leninsky Prosp., 119071 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gleb M.","family":"Burkin","sequence":"additional","affiliation":[{"name":"Research Institute of Chemistry, Peoples\u2019 Friendship University of Russia, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander A.","family":"Sapronov","sequence":"additional","affiliation":[{"name":"Research Institute of Chemistry, Peoples\u2019 Friendship University of Russia, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0156-5535","authenticated-orcid":false,"given":"Alexey S.","family":"Kubasov","sequence":"additional","affiliation":[{"name":"Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky Prosp., 119071 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9162-5169","authenticated-orcid":false,"given":"Valentine G.","family":"Nenajdenko","sequence":"additional","affiliation":[{"name":"Department of Chemistry, M.V. Lomonosov Moscow State University, 1, Leninskie Gory, 119991 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8806-2975","authenticated-orcid":false,"given":"Victor N.","family":"Khrustalev","sequence":"additional","affiliation":[{"name":"Research Institute of Chemistry, Peoples\u2019 Friendship University of Russia, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia"},{"name":"N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., 119071 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1765-5241","authenticated-orcid":false,"given":"Alexander V.","family":"Borisov","sequence":"additional","affiliation":[{"name":"R.E. Alekseev Nizhny Novgorod State Technical University, Minin St., 24, 603155 Nizhny Novgorod, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anatoly A.","family":"Kirichuk","sequence":"additional","affiliation":[{"name":"Research Institute of Chemistry, Peoples\u2019 Friendship University of Russia, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6411-5988","authenticated-orcid":false,"given":"Andreii S.","family":"Kritchenkov","sequence":"additional","affiliation":[{"name":"Research Institute of Chemistry, Peoples\u2019 Friendship University of Russia, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0827-8504","authenticated-orcid":false,"given":"Rosa M.","family":"Gomila","sequence":"additional","affiliation":[{"name":"Departament de Qu\u00edmica, Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7840-2139","authenticated-orcid":false,"given":"Antonio","family":"Frontera","sequence":"additional","affiliation":[{"name":"Departament de Qu\u00edmica, Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4445-2530","authenticated-orcid":false,"given":"Alexander G.","family":"Tskhovrebov","sequence":"additional","affiliation":[{"name":"Research Institute of Chemistry, Peoples\u2019 Friendship University of Russia, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1039","DOI":"10.1038\/nchem.2111","article-title":"Halogen bonding in water results in enhanced anion recognition in acyclic and rotaxane hosts","volume":"6","author":"Langton","year":"2014","journal-title":"Nat. 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