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Licensed Unlicensed Requires Authentication Published by De Gruyter September 21, 2018

A new stacking variant of Na2Pt(OH)6

Gohil S. Thakur, Hans Reuter, Claudia Felser and Martin Jansen

Abstract

A new stacking variant of sodium hexa-hydroxo platinate(IV), Na2Pt(OH)6, was synthesized and its structure elucidated through X-ray diffraction. The new polymorph was prepared by direct reaction of PtO2 with an excess of NaOH solution applying elevated oxygen pressure at 300°C. The structure consists of layers of edge sharing Pt(OH)6 and Na(OH)6 octahedra. These layers are separated by an edge-to-edge distance of ~2.4 Å. The packing of the hydroxide ions corresponds to the hcp sequence, the title compound thus may be regarded a cation ordered variant of the Brucite structure type. During heating above T~300°C all constitutional water is released, and anhydrous Na2PtO3 remains as the solid residue.


Dedicated to: Professor Bernt Krebs on the occasion of his 80th birthday.


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Received: 2018-06-25
Accepted: 2018-08-30
Published Online: 2018-09-21
Published in Print: 2018-11-27

©2018 Walter de Gruyter GmbH, Berlin/Boston

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