ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
X-ray single crystal work on W6Br16 shows the compound containing both polynuclear cations [W6Br8]6+, with effective charge z = 2.33 for the tungsten atoms, and polyanions [Br4]2-. The structure can be described by the formula {[W6Br8i]Br4a}[Br4]2/2a-a. The mean interatomic distances are W—W = 2.64, W—Bri = 2.58, W—Bra = 2,58 Å; linear [Br4]-group with Br—Br = 2.43 (1X) and 2.98 Å (2X).Data: W6Br16; orthorhombic in Bbam-D2h18; a = 14.606, b = 14.262, c = 12.071 Å; dX = 6.290, dexp = 6.09 g · cm-3; Z = 4. Only 394 reflexes of a total of 735 (hkl) are observable; R = 0.12, R' = 0.30; CuKα-radiation.
Notes:
Die Strukturbestimmung an Einkristallen von W6Br16 zeigte, daß die Verbindung nebeneinander polynucleare Kationen [W6Br8]6+ und Anionen [Br4]2- enthält. Die mittlere Oxydationsstufe des Wolframs ist also z = 2,33. Die Struktur kann mit der Formel {[W6Br8i]Br4a}[Br4]2/2a-a beschrieben werden. Die interatomaren Abstände betragen im Mittel: W-W = 2,64; W—Bri bzw, W—Bra-2,58 Å; Br4-Gruppe: linear mit Br—Br = 2,43 (1X) und 2,98 Å (2X).Daten: W6Br16; orthorhombisch in Bbam-D2h18; a = 14,606, b = 14,262, c = 12,071 Å; dRö = 6,290; dpyk = 6,09 g · cm-3; Z = 4. Von 735 Reflexen (hkl) wurden 394 beobachtet; R = 0,12, R' = 0,30; CuKα-Strahlung.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19683570417
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