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Preparation and Properties of the Tetraaqua-Platinum(II) Ion in Perchloric Acid Solution

Elding, Lars Ivar LU (1976) In Inorganica Chimica Acta 20(1). p.65-69
Abstract (Swedish)
Dilute solutions of the square-planar tetra-aqua complex pt(H2O)42+ have been prepared in a 1.00 M perchloric acid medium by addition of excess silver(I) perchlorate to potassium tetrachloroplatinate(II), equilibration at 70°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 UV and visible absorption spectrum of the complex has been recorded and its hydrolysis qualitatively studied. The experiments indicate that Pt(H2O)42+ is a weak acid with pKa>2.5. A white, amphoteric hydroxide of platinum(II) is precipitated in the pH region 4 to 10.
Abstract
Dilute solutions of the square-planar tetra-aqua complex pt(H2O)42+ have been prepared in a 1.00 M perchloric acid medium by addition of excess silver(I) perchlorate to potassium tetrachloroplatinate(II), equilibration at 70°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 UV and visible absorption spectrum of the complex has been recorded and its hydrolysis qualitatively studied. The experiments indicate that Pt(H2O)42+ is a weak acid with pKa>2.5. A white, amphoteric hydroxide of platinum(II) is precipitated in the pH region 4 to 10.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Platinum(II), Tetra-aqua complex, Preparation, Hydrolysis, Spectrum
in
Inorganica Chimica Acta
volume
20
issue
1
pages
5 pages
publisher
Elsevier
external identifiers
  • scopus:0003132750
ISSN
0020-1693
DOI
10.1016/S0020-1693(00)94092-1
language
English
LU publication?
yes
id
682b3499-dfbf-405b-8a5f-74d87d1ba827
date added to LUP
2017-02-19 17:04:52
date last changed
2017-07-30 05:21:52
@article{682b3499-dfbf-405b-8a5f-74d87d1ba827,
  abstract     = {Dilute solutions of the square-planar tetra-aqua complex pt(H2O)42+ have been prepared in a 1.00 M perchloric acid medium by addition of excess silver(I) perchlorate to potassium tetrachloroplatinate(II), equilibration at 70°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 UV and visible absorption spectrum of the complex has been recorded and its hydrolysis qualitatively studied. The experiments indicate that Pt(H2O)42+ is a weak acid with pKa>2.5. A white, amphoteric hydroxide of platinum(II) is precipitated in the pH region 4 to 10.},
  author       = {Elding, Lars Ivar},
  issn         = {0020-1693},
  keyword      = {Platinum(II),Tetra-aqua complex,Preparation,Hydrolysis,Spectrum},
  language     = {eng},
  number       = {1},
  pages        = {65--69},
  publisher    = {Elsevier},
  series       = {Inorganica Chimica Acta},
  title        = {Preparation and Properties of the Tetraaqua-Platinum(II) Ion in Perchloric Acid Solution},
  url          = {http://dx.doi.org/10.1016/S0020-1693(00)94092-1},
  volume       = {20},
  year         = {1976},
}