Synthesis and Characterization of [Fe 3 (As 3 ) 3 (As 4 )] 3− , a Binary Fe/As Zintl Cluster With an Fe 3 Core
We report here the synthesis and structural characterization of the first binary iron arsenide cluster anion, [Fe 3 (As 3 ) 3 (As 4 )] 3− , present in both [K([2.2.2]crypt)] 3 [Fe 3 (As 3 ) 3 (As 4 )] ( 1 ) and [K(18 ‐ crown ‐ 6)] 3 [Fe 3 (As 3 ) 3 (As 4 )] ⋅ en ( 2 ). The cluster contains an Fe 3 t...
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| Veröffentlicht in: | Angewandte Chemie 2023-03, Vol.135 (11) |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | We report here the synthesis and structural characterization of the first binary iron arsenide cluster anion, [Fe
3
(As
3
)
3
(As
4
)]
3−
, present in both [K([2.2.2]crypt)]
3
[Fe
3
(As
3
)
3
(As
4
)] (
1
) and [K(18
‐
crown
‐
6)]
3
[Fe
3
(As
3
)
3
(As
4
)]
⋅
en (
2
). The cluster contains an Fe
3
triangle with three short Fe−Fe bond lengths (2.494(1) Å, 2.459(1) Å and 2.668(2) Å for
1
, 2.471(1) Å, 2.473(1) Å and 2.660(1) Å for
2
), bridged by a 2‐butene‐like As
4
unit. An analysis of the electronic structure using DFT reveals a triplet ground state with direct Fe−Fe bonds stabilizing the Fe
3
core. |
|---|---|
| ISSN: | 0044-8249 1521-3757 |
| DOI: | 10.1002/ange.202217316 |