Rapid and selective extraction of Pd(ii) ions using the SCS type pincer ligand 1,3-bis(dimethylthiocarbamoyloxy)benzene, and its Pd(ii) extraction mechanism

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1243-1252 ◽  
Author(s):  
Muniyappan Rajiv Gandhi ◽  
Manabu Yamada ◽  
Yoshihiko Kondo ◽  
Atsushi Shibayama ◽  
Fumio Hamada
Keyword(s):  
Selective Extraction ◽  
Leach Liquor ◽  
Pincer Ligand ◽  
Tridentate Ligands ◽  
Extraction Mechanism ◽  
Automotive Catalyst ◽  
Chelate Rings

Extractant 1 extracts Pd(ii) ions via pincer type S–C–S tridentate ligands, with the formation of fused six-membered chelate rings. Rapid and selective extraction by 1 of >99% Pd(ii) ions from an automotive catalyst leach liquor was observed.

Palladacycles having normal and spiro chelate rings designed from bi- and tridentate ligands with an indole core: structure, synthesis and applications as catalysts

2017 ◽  
Vol 41 (19) ◽  
pp. 11342-11352 ◽  
Author(s):  
Mahabir P. Singh ◽  
Fariha Saleem ◽  
Ram S. Pal ◽  
Ajai K. Singh
Keyword(s):  
Core Structure ◽  
Tridentate Ligands ◽  
Structure Synthesis ◽  
Chelate Rings

Palladacycles with normal and spiro rings catalyze Suzuki–Miyaura coupling of ArBr/ArCl/allylation of aldehydes at 0.001/1 mol% loading.

Selective extraction of Mo using Cyanex-272 and tributyl phosphate from low grade Ni–Mo ore leach liquor

2012 ◽  
Vol 99 ◽  
pp. 120-126 ◽  
Author(s):  
Jun Wu ◽  
Chang Wei ◽  
Xingbin Li ◽  
Sifu Wang ◽  
Mingshuang Wang ◽  
...  
Keyword(s):  
Tributyl Phosphate ◽  
Selective Extraction ◽  
Leach Liquor ◽  
Low Grade ◽  
Cyanex 272

Selective extraction of Pd(II) ions from automotive catalyst residue in Cl− media by O-thiocarbamoyl-functionalized thiacalix[n]arenes

2015 ◽  
Vol 151 ◽  
pp. 133-140 ◽  
Author(s):  
Muniyappan Rajiv Gandhi ◽  
Manabu Yamada ◽  
Yoshihiko Kondo ◽  
Atsushi Shibayama ◽  
Fumio Hamada
Keyword(s):  
Selective Extraction ◽  
Automotive Catalyst

Iron pyrrole-based PNP pincer ligand complexes as catalyst precursors

2017 ◽  
Vol 73 (7) ◽  
pp. 569-574 ◽  
Author(s):  
Amanda M. Holland ◽  
Allen G. Oliver ◽  
Vlad M. Iluc
Keyword(s):  
Iron Catalysts ◽  
Distorted Octahedral Geometry ◽  
Carbonyl Ligand ◽  
Pyridine Ligand ◽  
Pincer Ligand ◽  
Tridentate Ligands ◽  
Apical Position ◽  
Positional Disorder ◽  
Carbonyl Ligands ◽  
Distorted Octahedral

The structure of a pincer ligand consists of a backbone and two `arms' which typically contain a P or N atom. They are tridentate ligands that coordinate to a metal center in a meridional configuration. A series of three iron complexes containing the pyrrole-based PNP pincer ligand 2,5-bis[(diisopropylphosphanyl)methyl]pyrrolide (PNpyrP) has been synthesized. These complexes are possible precursors to new iron catalysts. {2,5-Bis[(diisopropylphosphanyl)methyl]pyrrolido-κ3 P,N,P′}carbonylchlorido(trimethylphosphane-κP)iron(II), [Fe(C18H34NP2)Cl(C3H9P)(CO)] or [Fe(PNpyrP)Cl(PMe3)(CO)], (I), has a slightly distorted octahedral geometry, with the Cl and CO ligands occupying the apical positions. {2,5-Bis[(diisopropylphosphanyl)methyl]pyrrolido-κ3 P,N,P′}chlorido(pyridine-κN)iron(II), [Fe(C18H34NP2)Cl(C5H5N)] or [Fe(PNpyrP)Cl(py)] (py is pyridine), (II), is a five-coordinate square-pyramidal complex, with the pyridine ligand in the apical position. {2,5-Bis[(diisopropylphosphanyl)methyl]pyrrolido-κ3 P,N,P′}dicarbonylchloridoiron(II), [Fe(C18H34NP2)Cl(CO)2] or [Fe(PNpyrP)Cl(CO)2], (III), is structurally similar to (I), but with the PMe3 ligand replaced by a second carbonyl ligand from the reaction of (II) with CO. The two carbonyl ligands are in a cis configuration, and there is positional disorder of the chloride and trans carbonyl ligands.

Potentiality of methyltrioctylammonium chloride ligand for selective extraction of the Uranium(VI) metal ions from selective carbonate leach liquor

2016 ◽  
Vol 38 (8) ◽  
pp. 1204-1210 ◽  
Author(s):  
G. M. Hussein ◽  
Sally S. Muhammad ◽  
Nabawia A. Gomaa ◽  
Mohamed R. Shehata ◽  
Wafaa M. Hosny
Keyword(s):  
Metal Ions ◽  
Selective Extraction ◽  
Leach Liquor ◽  
Chloride Ligand
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