A new divalent organoeuropium(II) fluoride and serendipitous discovery of an alkoxide complex from pentaphenylcyclopentadiene precursors - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Australian Journal of Chemistry Année : 2022

A new divalent organoeuropium(II) fluoride and serendipitous discovery of an alkoxide complex from pentaphenylcyclopentadiene precursors

Résumé

From the redox-transmetallation protolysis (RTP) reaction of europium metal, Hg(C6F5)2 and pentaphenylcyclopentadiene, we isolated and crystallographically characterised small amounts of the first divalent europium fluoride half-sandwich complex [Eu(C5Ph5)(μ-F)(thf)2]2 (1). Subsequently, a rational synthesis of this complex from in situ formed [EuF2(thf)n] and [Eu(C5Ph5)2] was carried out. In addition, the new divalent Eu alkoxide complex [Eu(OC5Ph5*)2(thf)4] (2) (OC5Ph5* = 2,3,4,5,5 pentaphenylcyclopenta-1,3-dienolate) was identified by X-ray diffraction analysis, in which an intriguing phenyl group migration in the cyclopentadiene ligand occurred. This complex was shown to be derived from small impurities of 1,2,3,4,5-pentaphenylcyclopenta-1,3-dienol (C5Ph5OH) in the C5Ph5H starting material and was then synthesised on a larger scale. Density functional theory calculations provided evidence for the facile phenyl group migration observed in the cyclopentadienolate ring.
Fichier principal
Vignette du fichier
CH21324.pdf (1.22 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03653823 , version 1 (31-05-2022)

Licence

Paternité - Pas d'utilisation commerciale - Pas de modification

Identifiants

Citer

Angus Shephard, Aymeric Delon, Rory Kelly, Zhifang Guo, Sylviane Chevreux, et al.. A new divalent organoeuropium(II) fluoride and serendipitous discovery of an alkoxide complex from pentaphenylcyclopentadiene precursors. Australian Journal of Chemistry, 2022, 75, in press. ⟨10.1071/CH21324⟩. ⟨hal-03653823⟩
46 Consultations
14 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More