Coordination of Trivalent Lanthanides with Bismalonamide Ligands: Implications for Liquid-Liquid Extraction
Artikel i vetenskaplig tidskrift, 2017

The complexation of the bismalonamide ligand 2,2'[1,2-phenylenebis(methylene)] bis(N, N, N', N'-tetraethylmalonamide) (L), bearing two C-alkylated N, N, N', N'-tetraethylmalonamide groups, onto an ortho-xylylene [C6H4(CH2)(2)] platform with trivalent lanthanides was investigated, both in solid and solution states. The crystal structures [Nd-2(NO3)(6)L-2]center dot(CH3CN)(3) (2), [Nd-2(NO3)(4)L-2]center dot[Nd(NO3)(5)]center dot(CH3CN) 1.5 (3), Ce(NO3)(3)L-2 (4), and [NdL2]center dot(ClO4)(3)center dot C2H5OH (5) were analyzed by single-crystal X-ray diffraction. The ortho-bismalonamide (L) is tetradentate in structures 2, 3, and 5 and bidentate in 4 only. It was found that structures 2 and 3 are composed of dimeric species. According to electrospray-ionization mass spectrometry, the dimers are prevailing in acetonitrile solutions. The polydentate coordination of the ortho-bismalonamide (L) with trivalent lanthanides suggests that an entropy effect favors liquid-liquid extraction of metal ions with this type of ligand.


Liquid-liquid extraction


Mass spectrometry

Structure elucidation


Mikhail S Tyumentsev

Kemi och kemiteknik, Energi och material, Kärnkemi

Mark Foreman

Kemi och kemiteknik, Energi och material, Kärnkemi

A. M. Z. Slawin

University of St Andrews

D. B. Cordes

University of St Andrews

Otto Savolainen

Chalmers, Biologi och bioteknik

Rikard E Ylmén

Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Britt-Marie Steenari

Kemi och kemiteknik, Energi och material, Kärnkemi

Christian Ekberg

Kemi och kemiteknik, Energi och material, Kärnkemi

European Journal of Inorganic Chemistry

1434-1948 (ISSN)



Oorganisk kemi


Chalmers infrastruktur för masspektrometri