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Preparation and properties of the tetra-aquaplatinum(II) ion in perchloric acid solution

✍ Scribed by L.I. Elding

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
497 KB
Volume
20
Category
Article
ISSN
0020-1693

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✦ Synopsis

of the squire-planar tetra-aqua complex Pt(H20)42' have been prepared in a 1 .OOM perchloric acid medium by addition of excess silver(I) perchlorate to potassium tetrachloroplatinate(ll), equilibration at 7O"C, filtration of the silver chloride precipitate, and subsequent separation of the excess silver from the solution by electrolysis. The complex has also been prepared by addition of mercury(II) perchlorate to tetrachloroplatinate(II) solutions. The VV and visible absorption spectrum of the complex has been recorded and its hydrolysis qualitatively studied. The experiments indicate that Pt(H20)42+ is a weak acid with pK,>2.5.

A white, amphoteric hydroxide of platinum(II) is precipitated in the pH region 4 to 10.

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## Abstract Predictions of the β€œredox” and β€œcomplex” schemes for the Fe^3+^ catalyzed decomposition of H~2~O~2~ have been compared with published and new experimental data by numerical integratior of the appropriate complete sets of differential equations. Apparent discrepancies for the redox schem