‘Model complexes’ of palladium(II) and platinum(II) with pyrazole- and pyrimidine-derived ligands of biological interest
About: This article is published in Inorganica Chimica Acta.The article was published on 1982-01-01. It has received 3 citations till now. The article focuses on the topics: Pyrazole & Palladium.
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TL;DR: The use of pendant pyrazole groups to induce double cyclopalladation of 2-phenylpyrimidines has been investigated in this article, showing that 4,6-Bis(pyrazol-1-yl)-2-pyrimidine exhibits tridentate coordination.
37 citations
TL;DR: A series of pyrazole-functional adsorbents is synthesized by sol-gel processing technology and used to study the extraction characteristics for palladium, platinum, and gold chlorides from leaching solutions as discussed by the authors.
Abstract: A series of pyrazole-functional adsorbents is synthesized by sol-gel processing technology and used to study the extraction characteristics for palladium, platinum, and gold chlorides from leaching solutions. All organosilicon compound, N-(trimethoxysilylpropyl)-pyrazole, is synthesized as the functional precursor for these adsorbents. Hydrothermal treatments for the gelled materials alter pore characteristics without chemical property changes. To study adsorptive extraction of Pd(II), Pt(IV), and Au(III) chlorides, the hydrothermally treated adsorbent is used. The experimental results show that this adsorbent has high Pd(II) uptake capacity (1.41 mmol/g), strong selectivity for Pd(II) chloride over Pt(lV) and Au(III) chlorides, and no reactivity for Cn(II) and Fe(ll) in 2.0 M HCl solutions. The material also has sustainable stability over repeated metal loading and stripping in a short column. In addition to the experimental studies, the adsorption processes in batch and packed column systems are successfully modeled by using a pore diffusion model and presented.
3 citations
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TL;DR: A number of metal salts of pyrazole are reported in this article, where the pyrazolato ion acts as a bidentate, and tetrahedral or square planar surrounded metal ions are found.
34 citations
TL;DR: In this article, metal complexes of acetylhydrazide and benzoylhydrazides are reported and the NH nitrogen atom is proved to be the coordination site, and the monodentate character and the imidol structure of the ligands in the complexes are suggested.
28 citations