Structural variations in metal complexes of a tertiary a-hydroxyoxime
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Despite the long term interest in hydroxyoximes as metal ion extractants, there is a lack of information on the possible coordination modes these ligands can assume, particularly in concert with a co-ligand. This is pertinent to the use of these extractants in synergistic systems, where a combination of extractants can achieve commercially useful results. We report here the structures of some metal complexes (M = Mn, Co, Ni, Cu, and Zn) with (1-hydroxycyclohexyl)-phenyl ketone oxime. The results demonstrate that this ligand can support complexes ranging from mononuclear to trinuclear, in association with anionic and neutral co-ligands in some cases. While these results have been obtained in the solid state, they illustrate a range of possible species that may be formed in extractant solutions.
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X-ray crystal structures of nickel and cobalt alpha-hydroxyoxime-carboxylic acid synergist complexesBarnard, K.; McIldowie, Matthew; Nealon, Gareth; Ogden, Mark; Skelton, B. (2011)A reagent that has regularly found use in synergistic systems is LIX63, the active component of which is 5,8-diethyl-7-hydroxydodecan-6-oxime (LH). The use of LIX63 in conjunction with a carboxylic acid (RH) to synergistically ...
Vaughan, J.; Reid, Brodie; Wright, Phillip; Ramchandani, S.; Skelton, B.; Raiteri, Paolo; Muzzioli, S.; Brown, David; Stagni, S.; Massi, Massimiliano (2014)A family of tricarbonyl Re(I) complexes of the formulation fac-[Re(CO)3(NHC)L] has been synthesized and characterized, both spectroscopically and structurally. The NHC ligand represents a bidentate N-heterocyclic carbene ...
Characterization and Inhibition of a Nickel-Alpha-Hydroxyoxime (LIX 63) Salt Precipitate Formed under Proposed Commercial Operating ConditionsBarnard, K.; Shiers, D.; McIldowie, Matthew; Skelton, B.; Ogden, Mark; McCoy, T. (2014)As a prospective commercial solvent extraction (SX) process, laboratory-scale continuous tests were recently undertaken to assess the use of a solution of LIX 63 hydroxyoxime (“hydroxyoxime”) and Versatic 10 to kinetically ...