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Title: New homoleptic rare‐earth metal complexes comprising the unsymmetrically substituted amidinate ligand [MeC(NEt)(NtBu)] -
Author(s): Harmgarth, NicoleLook up in the Integrated Authority File of the German National Library
Liebing, Phil
Hilfert, Liane
Lorenz, Volker
Engelhardt, Felix
Busse, Sabine
Edelmann, Frank T.Look up in the Integrated Authority File of the German National Library
Issue Date: 2019
Type: Article
Language: English
URN: urn:nbn:de:gbv:ma9:1-1981185920-441031
Subjects: Homoleptic complexes
Rare-earth elements
Amidinate complexes
Abstract: New homoleptic complexes of selected rare-earth elements containing the unsymmetrically substituted amidinate ligand [MeC(NEt)(NtBu)]– [= (L)–] were synthesized and fully characterized. Treatment of in situ-prepared Li(L) (1) with anhydrous lanthanide(III) chlorides, LnCl3 (Ln = Sc, La, Ce, Ho), afforded three different types of amidinate complexes depending on the ionic radius of the central metal atom. The large La3+ formed the octa-coordinate DME solvate La(L)3(DME) (2). Using Ce3+, the octa-coordinate “ate” complex Li(THF)[Ce(L)4] (3) was formed. Depending on the crystallization conditions, compound 3 could be crystallized in two modifications differing in the coordination environment around Li. In the case of the smaller Sc3+ and Ho3+ ions, six-coordinate homoleptic Sc(L)3 (4) and Ho(L)3 (5) were isolated. The title compounds were fully characterized by spectroscopic and analytical methods as well as single-crystal X-ray diffraction. With Ln = La and Ce, several by-products incorporating lithium, chlorine and/or oxygen were also isolated and structurally characterized.
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
Sponsor/Funder: Projekt DEAL 2019
Journal Title: Zeitschrift für anorganische und allgemeine Chemie
Publisher: Wiley-VCH
Publisher Place: Weinheim
Volume: 645
Issue: 17
Original Publication: 10.1002/zaac.201900141
Page Start: 110
Page End: 1109
Appears in Collections:Fakultät für Verfahrens- und Systemtechnik (OA)

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