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With R=<jats:italic>t<\/jats:italic>Bu, a mixture of two isomers is formed; in one of them, the terminal phosphorus binds to the Fe center (ylidic structure), while in the other one, the central P atom is linked to Fe. Starting from differently functionalized parent triphosphanes and corresponding functionalized Fe complexes, the ratio of isomers does not change. The outcome of the reaction and therefore the binding modes of the triphosphane ligands in the resulting compounds can be influenced by the size of the substituents. In the case of R=<jats:italic>i<\/jats:italic>Pr a chelate complex is formed (both terminal P atoms are linked to the Fe center). Applying the mixed\u2010substituted triphosphane, the ylidic structure of the resulting complex is preferred. The new compounds were characterized by NMR spectroscopy in solution and single\u2010crystal X\u2010ray diffraction in solid\u2010state. The synthetic work was supported by DFT calculations.<\/jats:p>","DOI":"10.1002\/chem.202302661","type":"journal-article","created":{"date-parts":[[2023,10,7]],"date-time":"2023-10-07T05:10:47Z","timestamp":1696655447000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Iron(II) Complexes of P<sub>3<\/sub>\u2010Chain Ligands: Structural Diversity"],"prefix":"10.1002","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2727-7037","authenticated-orcid":false,"given":"Tam\u00e1s","family":"Holczbauer","sequence":"first","affiliation":[{"name":"Centre for Structural Science and Institute for Organic Chemistry HUN-REN Research Centre for Natural Sciences  Magyar Tud\u00f3sok k\u00f6r\u00fatja 2 1117 Budapest Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dalma","family":"G\u00e1l","sequence":"additional","affiliation":[{"name":"Department of Inorganic and Analytical Chemistry 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