A series of cyclopentadienyl lanthanum complexes with metalloid germanium clusters

• Verfasst von: Wörn, Kevin [VerfasserIn]
• Verfasst von: Poddel'sky, Andrey [VerfasserIn]
• Verfasst von: Mayer, Alex [VerfasserIn]
• Verfasst von: Schrenk, Claudio [VerfasserIn]
• Verfasst von: Schnepf, Andreas [VerfasserIn]
• Verfasst von: Klementyeva, Svetlana V. [VerfasserIn]
• Titel: A series of cyclopentadienyl lanthanum complexes with metalloid germanium clusters
• Verf.angabe: Kevin Woern, Andrey I. Poddel’sky, Alex Mayer, Claudio Schrenk, Andreas Schnepf, and Svetlana V. Klementyeva
• E-Jahr: 2024
• Jahr: July 10, 2024
• Umfang: 8 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 14.01.2025
• Titel Quelle: Enthalten in: Inorganic chemistry
• Ort Quelle: Washington, DC : American Chemical Society, 1962
• Jahr Quelle: 2024
• Band/Heft Quelle: 63(2024), 43, Seite 20197-20204
• ISSN Quelle: 1520-510X
• DOI: doi:10.1021/acs.inorgchem.4c01082
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1914542649

Abstract

A series of cyclopentadienyllanthanum complexes with the disilylated metalloid germanium cluster [Ge9(Hyp)2]2- [Hyp = Si(SiMe3)3] has been prepared and fully characterized. The synthetic procedure is based on the salt metathesis reaction of two different cyclopentadienyllanthanum diiodides CpLaI2 (Cp: Cp*, pentamethylcyclopentadienyl; Cpttt, 1,2,4-tri-tert-butylcyclopentadienyl) with K2[Ge9(Hyp)2] in tetrahydrofuran (THF) with a subsequent extraction with n-hexane. The composition of the obtained compounds and the mode of coordination of the germanium cluster to the rare-earth metal are strongly influenced by the steric demand of the cyclopentadienyl ligands and the crystallization conditions. The centrosymmetric dimeric compounds with the common formula [CpLa(solv)(η2,3-Ge9(Hyp)2)]2 [1, Cp = Cp*, solv-THF; 2, Cp = Cpttt, solv-NCCH2C(Me)NSiMe3] have been isolated by the slow evaporation of a n-hexane solution, while a mononuclear complex [CptttLa(THF)2(η3-Ge9(Hyp)2)] (4) was found by crystallization from THF. The repeated recrystallization of 1 from n-hexane afforded the asymmetric dimer [Cp*La(THF)(η2,3-Ge9(Hyp)2)][Cp*La(η2,3-Ge9(Hyp)2)] (3) with only one coordinated THF molecule.