Copper(I) d10⋯d10 interactions and diselenide(1-) radical anions in mixed valent selenides Cu4- δBiSe4I
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Melting reactions of copper, CuI, selenium, and Bi2Se 3 yielded black, shiny needles of Cu4BiSe4I = Cu4BiSe2(Se2)I. The compound decomposes peritectically above 635(5) K and crystallizes in the orthorhombic space group Pnma with a = 960.1(1) pm, b = 413.16(3) pm, and c = 2274.7(2) pm (T = 293(2) K). In the crystal structure, strands ${1}\atop{{\infty}} $[BiSeSe2/2(Se2)2/2]3- run along [010]. Therein, the bismuth(III) cation is coordinated by five selenium atoms, which form a square pyramid. The copper(I) cations are coordinated tetrahedrally by selenide, diselenide and iodide ions. Edge-sharing of these tetrahedra results in zigzag chains of copper cations with short distances of 262.7(4) pm. Enhanced dispersion of the 3d bands, the Crystal Orbital Hamilton Populations (COHP), and disynaptic ELI-D basins indicate weakly attractive d10⋯d10 interactions between the copper cations. The semiconducting properties and the calculated electronic band structure suggest an electron-precise compound. In copper-deficient Cu 3.824(8)BiSe4I, the Cu⋯Cu distances are 5 pm shorter, and Raman spectroscopy indicates the presence of diselenide(1-) radical anions besides the diselenide(2-) groups. As a result, in Cu 3.824(8)BiSe4I, selenium coexists in the oxidations states -II, -I, and -0.5.
Details
Originalsprache | Englisch |
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Seiten (von - bis) | 1131-1136 |
Seitenumfang | 6 |
Fachzeitschrift | Zeitschrift fur Anorganische und Allgemeine Chemie |
Jahrgang | 637 |
Ausgabenummer | 9 |
Publikationsstatus | Veröffentlicht - Juli 2011 |
Peer-Review-Status | Ja |
Externe IDs
ORCID | /0000-0002-2391-6025/work/166325872 |
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Schlagworte
ASJC Scopus Sachgebiete
Schlagwörter
- Bismuth, Closed-shell interactions, Copper, Mixed-valent compounds, Radical anions