Synthese und Kristallstruktur von (PPh4)4[Cu2Se14] / Synthesis and Crystal Structure of (PPh4)4[Cu2Se14]
Open Access
- 1 August 1990
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 45 (8) , 1128-1132
- https://doi.org/10.1515/znb-1990-0804
Abstract
(PPh4)4[Cu2Se14] has been prepared by the reaction of a lithium polyselenide solution in DMF with CuCl at 120 °C in the presence of PPh4Br. The compound forms black crystals, which were characterized by IR spectroscopy as well as by an X-ray structure determination. Space group P 21, Z = 2, 2690 observed unique reflexions, R = 0.095. Lattice dimensions at 19 °C: a = 2139.5(9), b = 1611.7(3), c = 1365.1(3) pm, β = 93.54(3)°. The compound consists of PPh4 + and [Cu2Se14]4- ions, in which the two copper atoms are bridged by an Se5 2- chain. One of the Cu atoms is a member of a CuSe4 ring, the other one of a CuSe5 ring; the coordination at each Cu atom is trigonal-planar.Keywords
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