In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 77, No. 2-3 ( 2022-03-28), p. 179-187
Abstract:
Thallium(I) decahydro- closo -decaborate Tl 2 [B 10 H 10 ] and thallium(I) dodecahydro- closo -dodecaborate Tl 2 [B 12 H 12 ] are readily available as microcrystalline powders from reactions of thallium(I) carbonate Tl 2 [CO 3 ] with aqueous solutions of the respective free acid (H 3 O) 2 [B 10 H 10 ] or (H 3 O) 2 [B 12 H 12 ]. Tl 2 [B 12 H 12 ] crystallizes with an anti -fluorite related structure (cubic, F m 3 ‾ $Fm\bar{3}$ , a = 1074.23(8) pm, Z = 4). Each Tl + cation is coordinated by four icosahedral [B 12 H 12 ] 2– anions ( d (B–B) = 180–181 pm) providing a twelvefold coordination sphere of hydrogen atoms ( d (Tl–H) = 296 pm). Tl 2 [B 10 H 10 ] crystallizes monoclinically in the space group P 2 1 / n with a = 704.03(5), b = 1111.45(8), c = 1281.16(9) pm and β = 94.912(3)° for Z = 4. The bicapped square antiprismatic [B 10 H 10 ] 2– anions ( d (B–B) = 147–176 pm to the two apical boron atoms, d (B–B) = 161–199 pm within the corpus) again form distorted tetrahedra around the (Tl1) + , but square pyramids around the (Tl2) + cations. Thus (Tl1) + is coordinated by 12 hydrogen atoms ( d (Tl1–H) = 275–315 pm), but (Tl2) + only by 11 of them ( d (Tl2–H) = 267–357 pm). Both compounds show a greenish-yellow photoluminescence caused by an interconfigurational 6 sp – 6 s 2 emission ( 3 P n → 1 S 0 , n = 0–2) at the Tl + cation.
Type of Medium:
Online Resource
ISSN:
0932-0776
,
1865-7117
DOI:
10.1515/znb-2022-0007
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2022
detail.hit.zdb_id:
2078109-X
detail.hit.zdb_id:
124635-5
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