{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T04:18:22Z","timestamp":1746591502900,"version":"3.40.5"},"reference-count":25,"publisher":"International Union of Crystallography (IUCr)","issue":"5","license":[{"start":{"date-parts":[[2025,4,8]],"date-time":"2025-04-08T00:00:00Z","timestamp":1744070400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"},{"start":{"date-parts":[[2025,4,8]],"date-time":"2025-04-08T00:00:00Z","timestamp":1744070400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"}],"funder":[{"DOI":"10.13039\/501100004350","name":"Studienstiftung des Deutschen Volkes","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004350","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["iucr.org","wiley.com","iucrj.org"],"crossmark-restriction":true},"short-container-title":["Acta Crystallogr E Cryst Commun","Acta Cryst E","Acta Cryst Sect E","Acta Crystallogr E","Acta Crystallogr Sect E","Acta Cryst E Cryst Commun","Acta Cryst Sect E Cryst Commun"],"accepted":{"date-parts":[[2025,4,3]]},"published-print":{"date-parts":[[2025,5,1]]},"abstract":"<jats:p>The synthesis and structural characterization of the crystal forms of (<jats:italic>R<\/jats:italic>,<jats:italic>R<\/jats:italic>)-TMCDA and its ethanol derivative, both doubly protonated with FeCl<jats:sub>4<\/jats:sub>\n                  <jats:sup>\u2212<\/jats:sup> and Cl<jats:sup>\u2212<\/jats:sup> as counter-ions, are reported, namely, (<jats:italic>R<\/jats:italic>,<jats:italic>R<\/jats:italic>)-<jats:italic>N<\/jats:italic>\n                  <jats:sup>1<\/jats:sup>,<jats:italic>N<\/jats:italic>\n                  <jats:sup>1<\/jats:sup>,<jats:italic>N<\/jats:italic>\n                  <jats:sup>2<\/jats:sup>,<jats:italic>N<\/jats:italic>\n                  <jats:sup>2<\/jats:sup>-tetramethylcyclohexane-1,2-bis(aminium) tetrachloridoferrate chloride, (C<jats:sub>10<\/jats:sub>H<jats:sub>24<\/jats:sub>N<jats:sub>2<\/jats:sub>)[FeCl<jats:sub>4<\/jats:sub>]Cl (<jats:bold>1a<\/jats:bold>), and (<jats:italic>R<\/jats:italic>,<jats:italic>R<\/jats:italic>)-<jats:italic>N<\/jats:italic>\n                  <jats:sup>1<\/jats:sup>-(2-hydroxyethyl)-<jats:italic>N<\/jats:italic>\n                  <jats:sup>1<\/jats:sup>,<jats:italic>N<\/jats:italic>\n                  <jats:sup>2<\/jats:sup>,<jats:italic>N<\/jats:italic>\n                  <jats:sup>2<\/jats:sup>-trimethylcyclohexane-1,2-bis(aminium) tetrachloridoferrate chloride (C<jats:sub>11<\/jats:sub>H<jats:sub>26<\/jats:sub>N<jats:sub>2<\/jats:sub>O)[FeCl<jats:sub>4<\/jats:sub>]Cl (<jats:bold>2a<\/jats:bold>). A notable feature across both synthesized compounds is the presence of N\u2014H...Cl hydrogen bonds of moderate strength in the solid state. In the case of the ethanol derivative of (<jats:italic>R<\/jats:italic>,<jats:italic>R<\/jats:italic>)-TMCDA, the structure also reveals the formation of intermolecular O\u2014H...Cl hydrogen bonds.<\/jats:p>","DOI":"10.1107\/s2056989025003019","type":"journal-article","created":{"date-parts":[[2025,4,8]],"date-time":"2025-04-08T12:26:18Z","timestamp":1744115178000},"page":"372-376","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["Synthesis and crystal structure study of (<i>R<\/i>,<i>R<\/i>)-TMCDA ethanol derivatives doubly protonated with FeCl<sub>4<\/sub>\n                  <sup>\u2212<\/sup> and Cl<sup>\u2212<\/sup> as counter-ions"],"prefix":"10.1107","volume":"81","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-1274-1975","authenticated-orcid":true,"given":"Franziska Dorothea","family":"Klotz","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Clara","family":"Alonso Felipe","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernando","family":"Villafa\u00f1e","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carsten","family":"Strohmann","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2025,4,8]]},"reference":[{"key":"zn2042_bb1","doi-asserted-by":"crossref","first-page":"356","DOI":"10.1021\/ar00131a005","volume":"19","author":"Beak","year":"1986","journal-title":"Acc. 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