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All TAPs exhibit a phosphaalkene\u2010acylphosphine equilibrium, which was investigated in detail by variable\u2010temperature (VT) NMR spectroscopy supported by density\u2010functional theory (DFT) calculations. Depending on the substituents, two phosphaalkene derivatives and ten acylphosphine derivatives could be isolated. NMR spectroscopy and single\u2010crystal X\u2010ray crystallography enabled a clear structural assignment of these compounds. Oxidation of selected TAPs led to the formation of the corresponding tris(acyl)phosphine oxides (TAPOs). Furthermore, their spectroscopic properties as well as their photochemistry was investigated. Especially, the TAPO compounds were evaluated for their suitability as photoinitiators by CIDNP spectroscopy, photobleaching measurements and by storage stability tests.<\/jats:p>","DOI":"10.1002\/chem.202302535","type":"journal-article","created":{"date-parts":[[2023,9,13]],"date-time":"2023-09-13T04:11:55Z","timestamp":1694578315000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Symmetrical and Mixed Tris(acyl)phosphines: Synthesis, Oxidation and Photochemistry"],"prefix":"10.1002","volume":"29","author":[{"given":"Tanja","family":"Wiesner","sequence":"first","affiliation":[{"name":"Institute of Inorganic Chemistry Graz University of Technology  Stremayrgasse 9\/V 8010 Graz Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dmytro","family":"Neshchadin","sequence":"additional","affiliation":[{"name":"Institute of Physical and Theoretical Chemistry Graz University of Technology  Stremayrgasse 9\/II 8010 Graz Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gabriel","family":"Glotz","sequence":"additional","affiliation":[{"name":"Institute of Physical and Theoretical Chemistry Graz University of Technology  Stremayrgasse 9\/II 8010 Graz Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zeno","family":"Gfader","sequence":"additional","affiliation":[{"name":"Institute of Inorganic Chemistry Graz University of Technology  Stremayrgasse 9\/V 8010 Graz Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Erik","family":"Schrader","sequence":"additional","affiliation":[{"name":"Laboratory of Inorganic Chemistry ETH Z\u00fcrich  Vladimir-Prelog-Weg 1\u20135\/10 8093 Z\u00fcrich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Samuel","family":"Christen","sequence":"additional","affiliation":[{"name":"Laboratory of Inorganic Chemistry ETH Z\u00fcrich  Vladimir-Prelog-Weg 1\u20135\/10 8093 Z\u00fcrich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roland C.","family":"Fischer","sequence":"additional","affiliation":[{"name":"Institute of Inorganic Chemistry Graz University of Technology  Stremayrgasse 9\/V 8010 Graz Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne\u2010Marie","family":"Kelterer","sequence":"additional","affiliation":[{"name":"Institute of Physical and Theoretical Chemistry Graz University of Technology  Stremayrgasse 9\/II 8010 Graz Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Georg","family":"Gescheidt","sequence":"additional","affiliation":[{"name":"Institute of Physical and Theoretical Chemistry Graz University of Technology  Stremayrgasse 9\/II 8010 Graz Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hansj\u00f6rg","family":"Gr\u00fctzmacher","sequence":"additional","affiliation":[{"name":"Laboratory of Inorganic Chemistry ETH Z\u00fcrich  Vladimir-Prelog-Weg 1\u20135\/10 8093 Z\u00fcrich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9213-940X","authenticated-orcid":false,"given":"Michael","family":"Haas","sequence":"additional","affiliation":[{"name":"Institute of Inorganic Chemistry Graz University of Technology  Stremayrgasse 9\/V 8010 Graz Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,10,24]]},"reference":[{"key":"e_1_2_9_1_1","doi-asserted-by":"publisher","DOI":"10.1201\/9781439827468"},{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/9783527648245"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201201026"},{"key":"e_1_2_9_4_1","unstructured":"\u00a0"},{"key":"e_1_2_9_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/marc.201400743"},{"key":"e_1_2_9_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202203842"},{"key":"e_1_2_9_7_2","doi-asserted-by":"publisher","DOI":"10.1002\/pola.27903"},{"key":"e_1_2_9_8_2","doi-asserted-by":"publisher","DOI":"10.3390\/molecules25071671"},{"key":"e_1_2_9_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201203648"},{"key":"e_1_2_9_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/ejic.201700140"},{"key":"e_1_2_9_11_2","doi-asserted-by":"publisher","DOI":"10.1039\/C5CC09760F"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1080\/10426509308038199"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/mrc.4752"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejic.201600592"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja991008f"},{"key":"e_1_2_9_16_1","unstructured":"Leppard D.\u2005G. 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