{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T01:43:39Z","timestamp":1773366219985,"version":"3.50.1"},"reference-count":104,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2019,7,30]],"date-time":"2019-07-30T00:00:00Z","timestamp":1564444800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Higher Education Institutional Excellence Programme in Hungary","award":["20765-3\/2019\/FEKUTSTRAT"],"award-info":[{"award-number":["20765-3\/2019\/FEKUTSTRAT"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Oxidation of sulfide to sulfate is known to consist of several steps. Key intermediates in this process are the so-called small oxoacids of sulfur (SOS)\u2014sulfenic HSOH (hydrogen thioperoxide, oxadisulfane, or sulfur hydride hydroxide) and sulfoxylic S(OH)2 acids. Sulfur monoxide can be considered as a dehydrated form of sulfoxylic acid. Although all of these species play an important role in atmospheric chemistry and in organic synthesis, and are also invoked in biochemical processes, they are quite unstable compounds so much so that their physical and chemical properties are still subject to intense studies. It is well-established that sulfoxylic acid has very strong reducing properties, while sulfenic acid is capable of both oxidizing and reducing various substrates. Here, in this review, the mechanisms of sulfide oxidation as well as data on the structure and reactivity of small sulfur-containing oxoacids, sulfur monoxide, and its precursors are discussed.<\/jats:p>","DOI":"10.3390\/molecules24152768","type":"journal-article","created":{"date-parts":[[2019,7,30]],"date-time":"2019-07-30T11:15:56Z","timestamp":1564485356000},"page":"2768","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Reactivity of Small Oxoacids of Sulfur"],"prefix":"10.3390","volume":"24","author":[{"given":"Sergei V.","family":"Makarov","sequence":"first","affiliation":[{"name":"State University of Chemistry and Technology, Sheremetevskiy str. 7, 153000 Ivanovo, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Attila K.","family":"Horv\u00e1th","sequence":"additional","affiliation":[{"name":"Department of Inorganic Chemistry, Institute of Chemistry, Faculty of Sciences, University of P\u00e9cs, Ifj\u00fas\u00e1g u. 6, H-7624, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anna S.","family":"Makarova","sequence":"additional","affiliation":[{"name":"G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Academicheskaya str., 1, 153045 Ivanovo, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,7,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1279","DOI":"10.1016\/S0891-5849(01)00710-9","article-title":"Hypothesis: The role of reactive sulfur species in oxidative stress","volume":"31","author":"Giles","year":"2001","journal-title":"Free Radic. Biol. Med."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Giles, G.I., Nasim, M.J., Ali, W., and Jacob, C. (2017). The Reactive Sulfur Species Concept: 15 Years On. Antioxidants, 6.","DOI":"10.3390\/antiox6020038"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1016\/j.plaphy.2012.03.016","article-title":"The biology of reactive sulfur species","volume":"59","author":"Gruhlke","year":"2012","journal-title":"Plant Physiol. 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