Crystallographic Determination of Three Ni-α-Hydroxyoxime-Carboxylic Acid Synergist Complexes

Barnard, K.R.; Nealon, Gareth L.; Ogden, Mark I.; Skelton, Brian W.

doi:10.1080/07366299.2010.515169

Cited by 32 publications

(26 citation statements)

References 24 publications

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“…Escaid 110 was the mixture of saturated aliphatic hydrocarbons and used as diluent, which was kindly supplied by Exxon Mobil (China) Investment Co., Ltd. Isobutyric acid (HL I ), an analog of Versatic10, was purchased from Adamas Reagent Co., Ltd. and used without further purification. 5‐Hydroxy‐4‐octanone oxime (HB I ), a short (C 8 )‐chained analog of Lix63, was synthesized and purified according to procedures described elsewhere . The final purified product was characterized by 1 H‐NMR (Figure S4) and FT‐IR, and the results were consistent with those reported in the literature .…”

Section: Methodssupporting

confidence: 65%

The Coordination Structure of the Extracted Cobalt(II) Complex with a Synergistic Mixture Containing Lix63 and Versatic10

Zhu

et al. 2017

J Chinese Chemical Soc

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In the present work, the cobalt(II) synergist complex with isobutyric acid (HLI) and 5‐hydroxy‐4‐octanone oxime (HBI), which were the corresponding short‐chain analogs of active synergistic mixture of Versatic10 (HL) and Lix63 (5,8‐diethyl‐7‐hydroxy‐6‐dodecanoneoxime, HB), was prepared and studied by X‐ray single‐crystal diffraction. The crystal structure of the cobalt(II) synergistic complex showed that the composition of the complex was Co(HBI)2(LI)2 with a cis‐form octahedron geometry structure. Both intra and intermolecular hydrogen bonding between the uncoordinated carbonyl oxygen atom of the deprotonated monodentate anionic ligand LI and the hydrogen atom of the α‐hydroxy or the oxime hydroxyl group of HBI were observed in the crystal lattice. In order to bridge the gap between the solid‐state structure of the cobalt(II) synergist complex and the solution structure of the extracted cobalt(II) complex with the actual synergistic mixture containing Versatic10 and Lix63 in the nonpolar organic phase, both the cobalt(II) synergistic complex and the extracted cobalt(II) complex were further investigated by Fourier transform infrared spectroscopy (FT‐IR) and electrospray ionization mass spectrometry (ESI‐MS). The results indicated that the extracted cobalt(II) complex in the nonpolar organic phase might possess a similar coordination structure as that of the cobalt(II) synergist complex.

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Section: Methodssupporting

confidence: 65%

The Coordination Structure of the Extracted Cobalt(II) Complex with a Synergistic Mixture Containing Lix63 and Versatic10

Zhu

et al. 2017

J Chinese Chemical Soc

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“…15 Molecular structure of a Ni(II) complex containing a di-n-propyl analogue of LIX63 (R = CH 3 CH 2 CH 2 -) and benzoic acid instead of Versatic acid from single crystal X-ray diffraction. 43 There are many examples of synergistic systems being used in the extraction of f-block elements, particularly those involving phosphorus(V) acids. 44,45 Light rare earth elements can be separated using blends of extractants such as PC 88A, Cyanex 302 and D2EHPA, and while there is some information on the stoichiometries of the assemblies formed, their structures are not as well defined as the Ni(II) systems described above.…”

Section: Synergistic and Other Extractantsmentioning

confidence: 99%

Solvent extraction: the coordination chemistry behind extractive metallurgy

et al. 2014

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The modes of action of the commercial solvent extractants used in extractive hydrometallurgy are classified according to whether the recovery process involves the transport of metal cations, M(n+), metalate anions, MXx(n-), or metal salts, MXx into a water-immiscible solvent. Well-established principles of coordination chemistry provide an explanation for the remarkable strengths and selectivities shown by most of these extractants. Reagents which achieve high selectivity when transporting metal cations or metal salts into a water-immiscible solvent usually operate in the inner coordination sphere of the metal and provide donor atom types or dispositions which favour the formation of particularly stable neutral complexes that have high solubility in the hydrocarbons commonly used in recovery processes. In the extraction of metalates, the structures of the neutral assemblies formed in the water-immiscible phase are usually not well defined and the cationic reagents can be assumed to operate in the outer coordination spheres. The formation of secondary bonds in the outer sphere using, for example, electrostatic or H-bonding interactions are favoured by the low polarity of the water-immiscible solvents.

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“…In spite of this difference in the mode of stabilization, the mixture of LIX63 and VA10 has a higher appearance frequency of the 6-coordinated complexes (see Table 3). and iso-propionic acid (as an analogue of VA10) [21]. This inconsistency might be due to the different length of hydrocarbon groups of these ligands.…”

Section: Complexes Coordinated With Lix63 and Va10mentioning

confidence: 99%

Effects of Water Molecules on Metal Complexes of Hydroxyoxime and Carboxylic Acid Extractants

Nishihara

Yoshio

2020

SERDJ

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Water molecules around the cobalt(II) (Co) and manganese(II) (Mn) complexes of the hydroxyoxime extractant, LIX63 and/or of the carboxylic acid extractant, Versatic acid 10 (VA10), in cyclohexane solvent were investigated using molecular dynamics calculations with simulated annealing. For the complexes of VA10, water molecules were coordinated to the metal ions, and VA10 molecules were found around the complexes. For the complexes of LIX63, a few water molecules were located at ~ 0.4 nm from the metal ions, in addition to the LIX63 molecules were also coordinated to the metal ions. Our trajectory analysis indicates that the water molecules at ~ 0.4 nm are hydrogen-bonded to LIX63 or other water molecules, suggesting that the hydrogen bonding contributes to the stabilization of the metal complex.

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Crystallographic Determination of Three Ni-α-Hydroxyoxime-Carboxylic Acid Synergist Complexes

Cited by 32 publications

References 24 publications

The Coordination Structure of the Extracted Cobalt(II) Complex with a Synergistic Mixture Containing Lix63 and Versatic10

The Coordination Structure of the Extracted Cobalt(II) Complex with a Synergistic Mixture Containing Lix63 and Versatic10

Solvent extraction: the coordination chemistry behind extractive metallurgy

Effects of Water Molecules on Metal Complexes of Hydroxyoxime and Carboxylic Acid Extractants

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