Unexpected formation of the copper(II) dinuclear mixed-ligand species in the ternary system of N,N,N′,N″,N″-pentamethyldiethylenetriamine with methionine- or histidinehydroxamic acids in aqueous solution

Polyhedron ◽  
2007 ◽  
Vol 26 (15) ◽  
pp. 4345-4353 ◽  
Author(s):  
Barbara Kurzak ◽  
Anna Kamecka ◽  
Katarzyna Bogusz ◽  
Julia Jezierska
Keyword(s):  
Aqueous Solution ◽  
Ternary System ◽  
Mixed Ligand ◽  
Unexpected Formation ◽  
Ligand Species

S-Dealkylation reactions of palladium(II) complexes of some phosphorus-sulphur and arsenic-sulphur chelates

1974 ◽  
Vol 27 (2) ◽  
pp. 259 ◽  
Author(s):  
TN Lockyer
Keyword(s):  
Aqueous Solution ◽  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Alkylating Agents ◽  
Free Ligand ◽  
Mixed Ligand ◽  
Resonance Spectroscopy ◽  
Square Planar ◽  
Ligand Species

Mono- and bis-chelated palladium(11) complexes of o-methylthiophenyldiphenylphosphine (P-SCH3),* bis(o-methy1thiophenyl)phenylphosphine (CH3S-P-SCH,), and their arsenic analogues, o-methylthiophenyldiphenylarsine (As-SCH,) and bis(o-methy1thiophenyl)phenylarsine (CH3S-As- SCH,), have been synthesized. The mono-chelated compounds Pd(X-SCH3)12 and Pd(CH,S-X- SCH3)12 (X = P or As) undergo S-demethylation in hot dimethylformamide to yield Pd2(X-S)212 and Pd2(CH,S-X-S)212. In the presence of one mole excess of free ligand, the dealkylation reaction affords bis-demethylated products Pd(X-S), and Pd(CH3S-X-S),. A mixed ligand species Pd(CH,S-P-S)(CH3S-As-S) was also isolated. These bis-demethylated compounds react with a variety of alkylating agents, RCH2Y, to give a complex of the original or of a different thioether ligand, of the form Pd(X-SR)Y2 or Pd(CH3S-X-SR)Y2 (R = Et, Bu and p-N02C6H4CH2; Y = halogen). In all complexes of CH3S-X-SCH,, including demethylated products, it is suggested that one thiomethyl residue is not coordinated and that they are essentially four-coordinate and square-planar. All four ligands yield the bis-chelated cation species, [Pd(~helate)~]~+, which were isolated as perchlorate salts. The arsenic chelates alone afford the bis-chelated halides Pd(As-SCH3),Y2 and P~(CH,S-AS-SCH,)~Y~, which are non-electrolytes in non-aqueous solution. This fact is attributed to their undergoing a fast rearrangement to form the mono-chelated species. This was confirmed by conductimetric titrations. Where possible, structures and rearrangements were substantiated by proton magnetic resonance spectroscopy.

Complex Formation in the Ternary System Tl(III)−CN-−Cl-in Aqueous Solution. A205Tl NMR Study

1996 ◽  
Vol 35 (24) ◽  
pp. 7074-7081 ◽  
Author(s):  
Katja E. Berg ◽  
Johan Blixt ◽  
Julius Glaser
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Ternary System ◽  
Nmr Study

scholarly journals Synthesis of Butyl-β-D-Galactoside in the Ternary System: Acetone/1-Butanol/Aqueous Solution

2020 ◽  
Vol 8 ◽  
Author(s):  
Diego Ahumada ◽  
Felipe Arenas ◽  
Fabián Martínez-Gómez ◽  
Cecilia Guerrero ◽  
Andrés Illanes ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ternary System
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