ISSN:
0044-2313
Keywords:
Tellurium
;
niobium oxytrihalides
;
hexatellurium(2+)
;
tetrachlorooxoniobate (1-)
;
synthesis
;
crystal structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
The Prismatic Te62+ Ion in the Structure of Te6(NbOCl4)2Te6(NbOCl4)2 is obtained from Te, TeCl4 and NbOCl3 at 200°C. It crystallizes triclinic, space group P1 (a = 915,5(4) pm, b = 1655,3(6) pm, c = 3134,4(9) pm, α = 42,62(2)°, β = 117,12(6)°, γ = 138,24(8)°). The crystal structure analysis shows, that the structure is built of one-dimensional polymeric ∞1[NbOCl4-] chains in which the monomers are linked via linear O—Nb—O-bridges and from discrete Te62+ polycations that are also arranged in strands, but without significant interactions. The structure is closley related but not isotypic to the previously reported tungsten containing analogue Te6(WOCl4)2 (monoclinic, P21/c). A comparison of the two structures shows that rotations of the cationic strands relative to the anionic strands lead to different cation-anion interactions.
Notes:
Te6(NbOCl4)2 wird aus Te, TeCl4 und NbOCl3 bei 200°C erhalten. Es kristallisiert triklin, P1, a = 915,5(4) pm, b = 1655,3(6) pm, c = 3134,4(9) pm, α = 42,62(2)°, β = 117,12(6)°, γ = 138,24(8)°. Die Kristallstrukturanalyse zeigt, daß die Struktur aus eindimensional-polymeren, über O-Atome verknüpften ∞1[NbOCl4-]-Strängen und aus diskreten, strangartig angeordneten Te62+-Polykationen aufgebaut ist. Die Struktur ist eng verwandt, aber nicht isotyp mit derjenigen der analogen wolframhaltigen Verbindung Te6(WOCl4)2 (monoklin, P21/c). Ein Strukturvergleich zeigt, daß Verdrehungen der Kationenstränge relativ zu den Anionensträngen zu unterschiedlichen Kation-Anionwechselwirkungen führen.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19966220513
