Coordination of Trivalent Lanthanides with Bismalonamide Ligands: Implications for Liquid-Liquid Extraction
Journal article, 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.

Bismalonamides

Liquid-liquid extraction

Lanthanides

Mass spectrometry

Structure elucidation

Author

Mikhail S Tyumentsev

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Mark Foreman

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

A. M. Z. Slawin

University of St Andrews

D. B. Cordes

University of St Andrews

Otto Savolainen

Chalmers, Biology and Biological Engineering

Rikard E Ylmén

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Britt-Marie Steenari

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Christian Ekberg

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

European Journal of Inorganic Chemistry

1434-1948 (ISSN)

37 4285-4298

Subject Categories

Inorganic Chemistry

Infrastructure

Chalmers Infrastructure for Mass spectrometry

DOI

10.1002/ejic.201700801

More information

Latest update

2/28/2018