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- W2149241608 abstract "Die Titelverbindung entsteht in Form schwarzer Kristalle bei der Einwirkung einer Lithiumpolyselenidlösung auf Bariumdiselenid und Cadmiumacetat in Dimethylformamid in Gegenwart von 18-Krone-6. Die Verbindung wurde durch das IR-Spektrum und eine röntgenographische Strukturanalyse charakterisiert. Raumgruppe P2/a, Z = 4, 5392 beobachtete unabhängige Reflexe, R = 4,8%. Gitterabmessungen bei −90°C: a = 2021,9(12); b = 1019,8(6); c = 2270,8(14) pm, ß = 106,98(4)°. Die Struktur ist aufgebaut aus [Ba(18-Krone-6)(DMF)4]2+-Ionen, in denen die Bariumionen von den sechs Sauerstoffatomen des Kronenethers und von vier O-Atomen der DMF-Moleküle koordiniert sind, und [Cd(Se4)2]2− -Anionen. In diesen sind die Cadmiumatome von zwei Tetraselenidionen chelatartig umgeben. Synthesis and Crystal Structure of [Ba(18-Crown-6)(DMF)4][Cd(Se4)2] The title compound has been prepared by the reaction of a DMF-solution of lithium polyselenide with BaSe2 and cadmium acetate in the presence of 18-crown-6, forming black crystals. The compound was characterized by IR spectroscopy and by an X-ray structure determination. Space group P2/a, Z = 4, 5392 observed unique reflections, R = 0.048. Lattice dimensions at −90°C: a = 2021.9(12); b = 1019.8(6); c= 2270.8(14)pm, ß = 106.98(4)°. The structure consists of [Ba(18-crown-6)(DMF)4]2+ ions, in which the barium ions are coordinated by the six oxygen atoms of the crown ether molecule and by four oxygen atoms of the DMF molecules, and of [Cd(Se4)2]2− ions. The cadmium atoms are coordinated by two tetraselenide ions in a chelating fashion." @default.
- W2149241608 created "2016-06-24" @default.
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- W2149241608 date "1992-02-01" @default.
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- W2149241608 title "Synthese und Kristallstruktur von [Ba(18-Krone-6)(DMF)4][Cd(Se4)2]" @default.
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- W2149241608 doi "https://doi.org/10.1002/zaac.19926080203" @default.
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