{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T08:38:20Z","timestamp":1788856700470,"version":"build-2803163510"},"reference-count":100,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T00:00:00Z","timestamp":1782777600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T00:00:00Z","timestamp":1782777600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["ChemistryOpen"],"published-print":{"date-parts":[[2026,7]]},"abstract":"\n The syntheses and structural elucidations of 16 novel compounds, derived from methane(poly\u2010)sulfonic acids are presented. The anhydrous acids, that is, methanedisulfonic acid (MDSA\u2014(H\n 2<\/jats:sub>\n C(SO\n 3<\/jats:sub>\n H)\n 2<\/jats:sub>\n ,\n 1<\/jats:bold>\n ) and methanetrisulfonic acid (MTSA), the latter as two polymorphic structures (HC(SO\n 3<\/jats:sub>\n H)\n 3<\/jats:sub>\n \u2010I (\n P<\/jats:italic>\n 3\n c<\/jats:italic>\n 1,\n 2<\/jats:bold>\n ) and HC(SO\n 3<\/jats:sub>\n H)\n 3<\/jats:sub>\n \u2010II (\n P<\/jats:italic>\n 2\n 1<\/jats:sub>\n \/\n n<\/jats:italic>\n ,\n 3<\/jats:bold>\n )) have been crystallized and structurally elucidated. Methanedisulfonic acid was subsequently used to prepare four group I methanedisulfonates (AM\n 2<\/jats:sub>\n [(H\n 2<\/jats:sub>\n C(SO\n 3<\/jats:sub>\n )\n 2<\/jats:sub>\n ], AM\u2009=\u2009Li (\n 6)<\/jats:bold>\n , K (\n 7<\/jats:bold>\n )\u00b7H\n 2<\/jats:sub>\n O, Rb (\n 8<\/jats:bold>\n ) and Cs (\n 10<\/jats:bold>\n )) as well as the strontium dihydrate Sr[H\n 2<\/jats:sub>\n C(SO\n 3<\/jats:sub>\n )\n 2<\/jats:sub>\n ](H\n 2<\/jats:sub>\n O)\n 2<\/jats:sub>\n (\n 9<\/jats:bold>\n ) and the ternary salt BaK\n 2<\/jats:sub>\n [(H\n 2<\/jats:sub>\n C(SO\n 3<\/jats:sub>\n )\n 2<\/jats:sub>\n ]\n 2<\/jats:sub>\n (\n 11<\/jats:bold>\n ). The known trisulfonate K\n 3<\/jats:sub>\n [HC(SO\n 3<\/jats:sub>\n )\n 3<\/jats:sub>\n ](H\n 2<\/jats:sub>\n O) was used for the preparation of the oxonium salt [H\n 3<\/jats:sub>\n O]\n 3<\/jats:sub>\n [HC(SO\n 3<\/jats:sub>\n )\n 3<\/jats:sub>\n ] (\n 4<\/jats:bold>\n ), which was isolated as a new polymorph (\n R<\/jats:italic>\n 3\n c<\/jats:italic>\n ). Subsequent neutralization led to isolation of the compounds AM\n 3<\/jats:sub>\n [HC(SO\n 3<\/jats:sub>\n )\n 3<\/jats:sub>\n ] (AM\u2009=\u2009Li (\n 12<\/jats:bold>\n )\u00b7(H\n 2<\/jats:sub>\n O)\n 4<\/jats:sub>\n , K (\n 13<\/jats:bold>\n ), Rb (\n 14<\/jats:bold>\n )\u00b7H\n 2<\/jats:sub>\n O, as well as the two ternary salts Rb\n 3<\/jats:sub>\n Ag\n 3<\/jats:sub>\n [HC(SO\n 3<\/jats:sub>\n )\n 3<\/jats:sub>\n ]\n 2<\/jats:sub>\n (\n 15<\/jats:bold>\n ) and Rb\n 5<\/jats:sub>\n Ag[HC(SO\n 3<\/jats:sub>\n )\n 3<\/jats:sub>\n ]\n 2<\/jats:sub>\n (H\n 2<\/jats:sub>\n O)\n 2<\/jats:sub>\n (\n 16<\/jats:bold>\n ). For a structural comparison between a mono\u2010, di\u2010, and trisulfonate, we also prepared the still elusive rubidium methanesulfonate, which crystallizes as the hydrate Rb[H\n 3<\/jats:sub>\n C(SO\n 3<\/jats:sub>\n )](H\n 2<\/jats:sub>\n O) (\n 5<\/jats:bold>\n ). Different synthetic approaches, as well as an in\u2010depth structural analysis of all compounds, are presented. Furthermore, compound\n 8<\/jats:bold>\n and the oxonium salt of compound\n 1<\/jats:bold>\n were investigated concerning their thermal decomposition.\n <\/jats:p>","DOI":"10.1002\/open.70247","type":"journal-article","created":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T05:33:23Z","timestamp":1782884003000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["The Versatile Structural World of Methanedi\u2010 and Trisulfonic Acid and Their Salts"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-7399-1542","authenticated-orcid":false,"given":"Katrin","family":"Eppers","sequence":"first","affiliation":[{"name":"Institute of Inorganic and Materials Chemistry University of Cologne Cologne Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alisha","family":"Mertens","sequence":"additional","affiliation":[{"name":"Institute of Inorganic and Materials Chemistry 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