Affiliation:
1. Fachbereich Chemie der Universität Marburg, Mans-Meerw ein-Straße, D-3550 M arburg/Lahn
2. Institut für Anorganische Chemie der Universität Karlsruhe, Engesserstraße, D-7500 Karlsruhe
Abstract
{K-[2 2 2]-Crypt}2Se7·H20 has been prepared by the reaction of a solution of potassium polyselenide in dimethylformamide at room temperature as black crystals, which were characterized by IR spectroscopy as well as by an X-ray structure determination. Space group P21/n, Z = 4, 5055 observed unique reflexions, R = 0.103. Lattice dimensions at 20 °C: a = 1435(1), b = 1320(1), c = 2966(2) pm, β = 102.50(6)° The heptaselenide ion represents approximately part of a helical chain of polymeric selenium.
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23 articles.
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