Lanthanide amide complexes supported by the bis‐tris(pyrazolyl)borate ligand environment

Chowdhury, T., Wilson, C. , Maichle-Mössmer, C., Anwander, R. and Farnaby, J. H. (2024) Lanthanide amide complexes supported by the bis‐tris(pyrazolyl)borate ligand environment. European Journal of Inorganic Chemistry, 27(11), e202300731. (doi: 10.1002/ejic.202300731)

Abstract

Synthesis of primary lanthanide amides in the bis-hydrotris(1-pyrazolyl)borate ligand environment has been achieved. Salt metathesis of [Dy(Tp)2(OTf)] 1-Dy (OTf = CF3SO3) with K(Nʹʹ) (Nʹʹ = N(SiMe3)2) in toluene yielded the [bis(silyl)]amide [Dy(Tp)2(Nʹʹ)] 2-Dy. Complexes 1-Ln and 2-Ln were both used to access primary lanthanide amides, where either metathesis of 1-Ln with K(NHArCF3) (ArCF3 = C6H3(CF3)2-3,5) or protonolysis of 2-Ln with H2NArCF3 in toluene yielded the primary amides [Ln(Tp)2(NHArCF3)] 3-Ln (Ln = Y, Dy). The synthesis of parent amides was also attempted, but the metathesis of 1-Y with NaNH2 yielded complicated reaction mixtures, but from which the dimeric parent amide [{Y(Tp)2(μ-NH2)}2] 4-Y and an ʻateʼ-salt [{Y(Tp)2(μ2-OTf)(μ3-OTf)Na(THF)2}2] 5-Y were isolated. Full characterisation data are presented for all complexes, including solid-state molecular structure determination by single-crystal X-ray diffraction.

• Item Type: Articles
• Keywords: Lanthanides, amides, pyrazoles, heteroleptic, synthesis.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Wilson, Dr Claire and Farnaby, Dr Joy and Chowdhury, Mr Tajrian
• Authors: Chowdhury, T., Wilson, C., Maichle-Mössmer, C., Anwander, R., and Farnaby, J. H.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: European Journal of Inorganic Chemistry
• Publisher: Wiley
• ISSN: 1434-1948
• ISSN (Online): 1099-0682
• Published Online: 12 January 2024
• Copyright Holders: Copyright © 2024 The Authors
• First Published: First published in European Journal of Inorganic Chemistry 2024
• Publisher Policy: Reproduced under a Creative Commons License