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Related Experiment Video

Updated: Jun 28, 2026

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

Selective pyrimidinethiols for palladium(II) determination.

A K Singh1, M Katyal, A M Bhatti

  • 1St. Stephen's College, Delhi 110007, India.

Talanta
|April 1, 1976
PubMed
Summary

This study introduces a new method for detecting palladium using specific thiol compounds. The technique allows for the accurate measurement of microgram palladium levels, even with other platinum metals present.

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Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

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Area of Science:

  • Analytical Chemistry
  • Coordination Chemistry
  • Spectrophotometry

Background:

  • Accurate determination of palladium is crucial in various industrial and environmental applications.
  • Existing methods for palladium detection may lack selectivity or sensitivity, especially in complex matrices.
  • The need for a reliable method to quantify palladium in the presence of other platinum-group metals.

Purpose of the Study:

  • To develop a selective and sensitive extractive spectrophotometric method for palladium(II) determination.
  • To investigate the reaction of substituted 4,4,6-trimethyl-(1H,4H)2-pyrimidinethiols with palladium(II).
  • To assess the method's applicability in the presence of other platinum-group metals and various interfering species.

Main Methods:

  • Reaction of alkyl and aryl substituted 4,4,6-trimethyl-(1H,4H)2-pyrimidinethiols with palladium(II) in strong acidic media.
  • Formation of yellow palladium complexes with a maximum absorbance at 430 nm.
  • Extraction of the palladium complexes into non-polar solvents followed by spectrophotometric analysis.

Main Results:

  • Selective complexation of palladium(II) by the specified pyrimidinethiols was achieved.
  • The formed palladium complexes exhibited a characteristic absorbance at 430 nm, suitable for spectrophotometry.
  • Microgram quantities of palladium could be accurately determined, demonstrating high tolerance to milligram amounts of diverse species, including other platinum-group metals.

Conclusions:

  • The developed extractive spectrophotometric procedure offers a selective and sensitive method for palladium determination.
  • This method is robust and effective for quantifying palladium even in the presence of significant amounts of other platinum-group metals.
  • The use of substituted pyrimidinethiols provides a valuable tool for trace palladium analysis.