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Different combinations of the imido and \u201cX\u201d ligands have been employed to understand synthetic peculiarities. Selected complexes have been characterized by single\u2010crystal X\u2010ray analysis. Due to the pronounced \u03c3\u2010donor\/\u03c0\u2010acceptor characteristics of CAACs, the corresponding neutral and cationic molybdenum imido alkylidene CAAC complexes do not require the presence of stabilizing donor ligands such as nitriles. Calculations on the PBE0\u2010D3BJ\/def2\u2010TZVP level for PBE0\u2010D3BJ\/def2\u2010SVP optimized geometries revealed partial charges at molybdenum similar to the corresponding molybdenum imido alkylidene <jats:italic>N<\/jats:italic>\u2010heterocyclic carbene (NHC) complexes with a slightly higher polarization of the molybdenum alkylidene bond in the CAAC complexes. All cationic complexes have been tested in olefin metathesis reactions and showed improved activity compared to the analogous NHC complexes for hydrocarbon\u2010based substrates, allowing for turnover numbers (TONs) up to 9500 even at room temperature. Some Mo imido alkylidene CAAC complexes are tolerant towards functional groups like thioethers and sulfonamides.<\/jats:p>","DOI":"10.1002\/chem.202301818","type":"journal-article","created":{"date-parts":[[2023,6,27]],"date-time":"2023-06-27T08:50:25Z","timestamp":1687855825000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Neutral and Cationic Molybdenum Imido Alkylidene Cyclic Alkyl Amino Carbene (CAAC) Complexes for Olefin Metathesis"],"prefix":"10.1002","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-5356-2153","authenticated-orcid":false,"given":"Koushani","family":"Kundu","sequence":"first","affiliation":[{"name":"Institute of Polymer Chemistry University of Stuttgart  Pfaffenwaldring 55 70569 Stuttgart Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Janis V.","family":"Musso","sequence":"additional","affiliation":[{"name":"Institute of Polymer Chemistry University of Stuttgart  Pfaffenwaldring 55 70569 Stuttgart Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mathis J.","family":"Benedikter","sequence":"additional","affiliation":[{"name":"Institute of Polymer Chemistry University of Stuttgart  Pfaffenwaldring 55 70569 Stuttgart Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wolfgang","family":"Frey","sequence":"additional","affiliation":[{"name":"Institute of Organic Chemistry University of Stuttgart  Pfaffenwaldring 55 70569 Stuttgart Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katrin","family":"Gugeler","sequence":"additional","affiliation":[{"name":"Institute of Theoretical Chemistry University of Stuttgart  Pfaffenwaldring 55 70569 Stuttgart Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Johannes","family":"K\u00e4stner","sequence":"additional","affiliation":[{"name":"Institute of Theoretical Chemistry University of Stuttgart  Pfaffenwaldring 55 70569 Stuttgart Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6472-5156","authenticated-orcid":false,"given":"Michael R.","family":"Buchmeiser","sequence":"additional","affiliation":[{"name":"Institute of Polymer Chemistry University of Stuttgart  Pfaffenwaldring 55 70569 Stuttgart Germany"},{"name":"German Institutes of Textile and Fiber Research (DITF)  K\u00f6rschtalstr. 26 73770 Denkendorf Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,8,9]]},"reference":[{"key":"e_1_2_8_1_1","unstructured":"\u00a0"},{"key":"e_1_2_8_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.8b00499"},{"key":"e_1_2_8_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0277-5387(00)80695-6"},{"key":"e_1_2_8_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja0665904"},{"key":"e_1_2_8_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr800502p"},{"key":"e_1_2_8_6_1","unstructured":"\u00a0"},{"key":"e_1_2_8_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/om7008028"},{"key":"e_1_2_8_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/adsc.201501140"},{"key":"e_1_2_8_9_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.organomet.8b00150"},{"key":"e_1_2_8_10_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.0c11334"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.9b00238"},{"key":"e_1_2_8_12_1","unstructured":"\u00a0"},{"key":"e_1_2_8_13_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.5b00373"},{"key":"e_1_2_8_14_2","doi-asserted-by":"publisher","DOI":"10.1039\/B612793M"},{"key":"e_1_2_8_15_1","unstructured":"\u00a0"},{"key":"e_1_2_8_16_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202011666"},{"key":"e_1_2_8_17_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.organomet.1c00577"},{"key":"e_1_2_8_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/cctc.201600624"},{"key":"e_1_2_8_19_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.201700213"},{"key":"e_1_2_8_20_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.9b00422"},{"key":"e_1_2_8_21_2","volume":"26","author":"Musso J. 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