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Due to the relative instability of the C\u2500Te bond, tellurocyanate chemistry has seen only scarce attention. Here, we present the facile synthesis and thorough characterization of [K@crypt\u2010222][TeCN]. The anion is essentially linear with interatomic distances C\u2500N\u00a0=\u00a01.150(6)\u00c5 and C\u2500Te\u00a0=\u00a02.051(4)\u00c5, thus approximating a C\u2261N triple bond and for C\u2500Te a bond order between 1 and 2. Fully\n                    <jats:sup>13<\/jats:sup>\n                    C and\n                    <jats:sup>15<\/jats:sup>\n                    N labeled [Te\n                    <jats:sup>13<\/jats:sup>\n                    C\n                    <jats:sup>15<\/jats:sup>\n                    N]\n                    <jats:sup>\u2212<\/jats:sup>\n                    allowed for the extraction of chemical shifts and all possible coupling constants (\n                    <jats:sup>13<\/jats:sup>\n                    C\u00a0=\u00a077.8 ppm,\n                    <jats:sup>15<\/jats:sup>\n                    N\u00a0=\u00a0285.7\u00a0ppm,\n                    <jats:sup>125<\/jats:sup>\n                    Te\u00a0=\u00a0\u2212566\u00a0ppm,\n                    <jats:sup>1<\/jats:sup>\n                    <jats:italic>J<\/jats:italic>\n                    <jats:sub>13C\u201015N<\/jats:sub>\n                    \u00a0=\u00a08 Hz,\n                    <jats:sup>1<\/jats:sup>\n                    <jats:italic>J<\/jats:italic>\n                    <jats:sub>13C\u2010125Te<\/jats:sub>\n                    \u00a0=\u00a0748\u00a0Hz,\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>J<\/jats:italic>\n                    <jats:sub>15N\u2010125Te<\/jats:sub>\n                    \u00a0=\u00a055\u00a0Hz), which were also determined independently by quantum chemical calculations. In the series [\n                    <jats:italic>Ch<\/jats:italic>\n                    CN]\n                    <jats:sup>\u2212<\/jats:sup>\n                    (\n                    <jats:italic>Ch<\/jats:italic>\n                    \u00a0=\u00a0O\u2500Te), [TeCN]\n                    <jats:sup>\u2212<\/jats:sup>\n                    shows the strongest spin\u2010orbit coupling (SOC) induced heavy\u2010atom effect on the light\u2010atom shielding (SO\u2010HALA\u2010effect). In contrast,\n                    <jats:sup>15<\/jats:sup>\n                    N shifts are also well described without considering relativistic effects and\/or SOC. Negative\u2010ion photoelectron spectroscopy was used to extract the electron affinity (EA\u00a0=\u00a03.034\u00a0eV) and spin\u2010orbit splitting (3807\u00a0cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) of [TeCN]\n                    <jats:sup>\u2022<\/jats:sup>\n                    . These values continue the trends of falling EA and rising SOC in the series [\n                    <jats:italic>Ch<\/jats:italic>\n                    CN]\n                    <jats:sup>\u2022<\/jats:sup>\n                    .\n                  <\/jats:p>","DOI":"10.1002\/anie.202507543","type":"journal-article","created":{"date-parts":[[2025,5,27]],"date-time":"2025-05-27T04:39:48Z","timestamp":1748320788000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["A Thorough Characterization of the Tellurocyanate Anion"],"prefix":"10.1002","volume":"64","author":[{"given":"Hennes","family":"G\u00fcnther","sequence":"first","affiliation":[{"name":"Department of Chemistry Philipps University of Marburg  Hans\u2010Meerwein\u2010Str. 4 D\u201035043 Marburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5060-1689","authenticated-orcid":false,"given":"Florian","family":"Weigend","sequence":"additional","affiliation":[{"name":"Institute for Quantum Materials and Technologies Karlsruhe Institute of Technology  Hermann\u2010von\u2010Helmholtz\u2010Platz 1 D\u201076344 Eggenstein\u2010Leopoldshafen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9738-2321","authenticated-orcid":false,"given":"Xiulan","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Chemistry Philipps University of Marburg  Hans\u2010Meerwein\u2010Str. 4 D\u201035043 Marburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2852-4047","authenticated-orcid":false,"given":"Wenjin","family":"Cao","sequence":"additional","affiliation":[{"name":"Physical Sciences Division Pacific Northwest National Laboratory  Richland Washington 99352 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9792-6218","authenticated-orcid":false,"given":"Xiao\u2010Fei","family":"Gao","sequence":"additional","affiliation":[{"name":"Physical Sciences Division Pacific Northwest National Laboratory  Richland Washington 99352 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8326-1780","authenticated-orcid":false,"given":"Xue\u2010Bin","family":"Wang","sequence":"additional","affiliation":[{"name":"Physical Sciences Division Pacific Northwest National Laboratory  Richland Washington 99352 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3538-6049","authenticated-orcid":false,"given":"Frank","family":"Tambornino","sequence":"additional","affiliation":[{"name":"Department of Chemistry Philipps University of Marburg  Hans\u2010Meerwein\u2010Str. 4 D\u201035043 Marburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,6,3]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/cber.19250580429"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/zaac.19926120113"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/zaac.19946200303"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201602310"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201805348"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201803888"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/zaac.19301900102"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1039\/c19680001290"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.3891\/acta.chem.scand.31a-0645"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1039\/c39790000414"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/om5006403"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja00447a032"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.200901472"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202404648"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1039\/C4CP00976B"},{"key":"e_1_2_8_16_1","first-page":"843","volume":"57","author":"Bock H.","year":"2002","journal-title":"Z. 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