2022
DOI: 10.1002/ange.202211147
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Die Einführung des Perfluorierten Cp*‐Liganden in die Koordinationschemie

Abstract: Die Reaktion zwischen AgBF 4 und [Rh-(COD)Cl] 2 (COD = 1,5-Cyclooctadien) in Gegenwart von [NEt 4 ][C 5 (CF 3 ) 5 ] ergab den perfluorcarbonlöslichen Komplex [Rh(COD)(C 5 (CF 3 ) 5 )] durch Salzmetathese. Dieser Komplex stellt das erste Beispiel für eine erfolgreiche Koordination des schwach basischen [C 5 (CF 3 ) 5 ] À -Liganden, seit dessen Erstsynthese im Jahr 1980 dar. Zusätzlich zu [Rh(COD)(C 5 (CF 3 ) 5 )] wurde das Nebenprodukt [Rh(COD)(C 5 (CF 3 ) 4 H)] isoliert und vollständig charakterisiert. Begleit… Show more

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“…Nevertheless, perfluorinated Cp derivatives remain scarce due to their challenging synthesis and coordination. 18 26 Interestingly, the corresponding diene HC 5 F 5 proved to be only slightly more acidic (estimated pK a = 13-15) than HC 5 H 5 (pK a = 15.5), due to the strong pronounced +M-effect of fluorine. 24 In contrast, the introduction of perfluorinated alkyl groups, such as CF 3 , exhibit a stronger acidity, due to the absence of any conjugative donor effects.…”
Section: Introductionmentioning
confidence: 99%
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“…Nevertheless, perfluorinated Cp derivatives remain scarce due to their challenging synthesis and coordination. 18 26 Interestingly, the corresponding diene HC 5 F 5 proved to be only slightly more acidic (estimated pK a = 13-15) than HC 5 H 5 (pK a = 15.5), due to the strong pronounced +M-effect of fluorine. 24 In contrast, the introduction of perfluorinated alkyl groups, such as CF 3 , exhibit a stronger acidity, due to the absence of any conjugative donor effects.…”
Section: Introductionmentioning
confidence: 99%
“…Nevertheless, perfluorinated Cp derivatives remain scarce due to their challenging synthesis and coordination. [18] For example, the fully fluorinated Cp, [C 5 F 5 ] -, has been first synthesized by Seppelt et al in 1984. However, fast fluoride abstractions and further decomposition pathways prevented any coordination onto a metal center.…”
Section: Introductionmentioning
confidence: 99%
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