Work

Contrasting Reactions of Carbodiimides with Divalent Lanthanoid Species

Year: 2025

Type: article

Abstract: Reactions of lanthanoid species with carbodiimides (RN ═ C ═ NR′) show considerable variety. Thus, treatment of the divalent 2,6‐di‐tert‐butyl‐4‐ethylphenolatosamarium complex, [Sm(OArEt)2(thf)3]·PhMe with N,N'‐diisopropylcarbodiimide (iPrNCNiPr) resulted in the formation of the oxalamidinatosamarium(III) complex [(OArEt)₂Sm(μ‐C₂N₄iPr₄)Sm(OArEt)₂]·2PhMe (1). In contrast, the use of the bulkier N,N'‐dicyclohexylcarbodiimide (CyNCNCy) led to the formation of a formamidinatosamarium(III) complex [Sm(OArEt)2(CyNC(H)NCy)(thf)2]⋅2thf (2). Reactions between rare earth metals (RE = Yb, Eu) with one molar equivalent of bis(phenylethynyl)mercury (Hg(PhCC)2) and two molar equivalents of N,N'‐dicyclohexylcarbodiimide (CyNCNCy) in tetrahydrofuran (thf) at room temperature yielded lanthanoid C‐phenylethynylamidinate complexes, trivalent [YbIII{CyNC(C≡CPh)NCy}3]·2thf (3) and divalent [Eu{CyNC(C≡CPh)NCy}₂(thf)₂] (4). [Sm(OArEt)2(thf)3].PhMe was obtained from SmI2(thf)2 and the in situ generated potassium aryl oxide and is a five‐coordinate monomer with a stereochemistry between trigonal bipyramidal and square pyramidal.

Source: Chemistry - A European Journal

DOI: 10.1002/chem.202500759

Authors: Vidushi P. Vithana, Zhifang Guo, Glen B. Deacon, Peter C. Junk

Institutions: James Cook University, Monash University

Language: English

Topic: Lanthanide and Transition Metal Complexes

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,640

Funder: Agricultural Research Council