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BY-NC-ND 3.0 license Open Access Published by De Gruyter June 2, 2014

Synthese und Kristallstrukturen der spirocyclischen Polyselenido-Komplexe [Na-15-Krone-5]2[M(Se 4)2] mit M = Zink, Cadmium und Quecksilber

  • Jörg Adel , Frank Weller and Kurt Dehnicke

Abstract

The title compounds have been prepared by reactions of the metal acetates of zink, cadmium, and mercury with ethanolic solutions of sodium polyselenides in the presence of 15-crown-5. They form dark red crystals, which were characterized by their IR specta as well as by X-ray crystal structure determinations. All complexes [Na-15-crown-5]2[M(Se 4)2] with M = Zn (1), Cd (2), Hg (3) crystallize isotypically in the space group C2/c with 4 formula units per unit cell. In the anions [M(Se4)2]2- the metal atoms are coordinated tetrahedrally by four selenium atoms of two Se42- units, thus forming a spiro-bicyclus. The complex cations [Na-15-crown-5]+ have a Na---Se contact of approximately 299 pm with two selenium atoms of a MSe4 group, allowing formulation of triple ion species.

Received: 1988-5-4
Published Online: 2014-6-2
Published in Print: 1988-9-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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