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

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 deter...

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Published inZeitschrift für Naturforschung. B, A journal of chemical sciences Vol. 43; no. 9; pp. 1094 - 1100
Main Authors Adel, Jörg, Weller, Frank, Dehnicke, Kurt
Format Journal Article
LanguageEnglish
Published Verlag der Zeitschrift für Naturforschung 01.09.1988
Subjects
Cadmium
Crystal Structure
Mercury
Polyselenide Complexes of Zink
Syntheses
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Summary: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] [M(Se ] 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(Se the metal atoms are coordinated tetrahedrally by four selenium atoms of two Se 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 MSe group, allowing formulation of triple ion species.
ISSN:0932-0776
1865-7117
DOI:10.1515/znb-1988-0903