ISSN:
0044-2313
Keywords:
Thorium bromide clusters
;
crystal structures
;
interstitial atoms
;
hydrides
;
magnetic behaviour
;
electronic structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Thorium Bromide Clusters with Octahedral Th6 UnitsThe preparation, structures and properties of the compounds MTh6Br15 (M = Mn, Fe, Co, Ni), NaxFeTh6Br15, Th6Br15H7 and Th6Br14C are described (MTh6Br15: Im3m; M = Mn: a = 1150.85(3) pm; Fe: a = 1148.81(4) pm; Co: a = 1150.68(2) pm; Ni: a = 1151.43(4) pm; Th6Br15H7: a = 1140.7(1) pm; Th6Br14C: Cmca; a = 1576.4(3) pm, b = 1416.0(4) pm; c = 1312.4(3) pm). The structures of these compounds are closely related to those of the niobium halides Nb6F15 and Nb6Cl14, respectively. All compounds contain Th6Br12 clusters with octahedral Th6 cores and interstitial atoms in these cores. The magnetic properties of the compounds are discussed and compared with the results of Extended-Hückel calculations.
Notes:
Die Darstellung, Strukturen und Eigenschaften der Verbindungen MTh6Br15 (M=Mn, Fe, Co, Ni), NaxFeTh6Br15, Th6Br15H7 und Th6Br14C werden beschrieben. Die Strukturen dieser Verbindungen leiten sich von denen der bekannten Niobhalogenide Nb6F15 und Nb6Cl14 ab (MTh6Br15: Im3m; M = Mn: a = 1150,85(3) pm; Fe: a = 1148,81(4) pm; Co: a = 1150,68(2) pm; Ni: a = 1151,43(4) pm; Th6Br15H7: a = 1140,7(1) pm; Th6Br14C: Cmca; a = 1576,4(3) pm; b = 1416,0(4) pm; c = 1312,4(3) pm). Alle Verbindungen enthalten Th6Br12-Cluster mit oktaedrischen Th6-Einheiten und interstitiellen Atomen im Oktaeder. Die magnetischen Eigenschaften der Verbindungen werden beschrieben und anhand von Extended-Hückel-Rechnungen diskutiert.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19915980104
Permalink
