| Autor: |
Domasevitch KV; Inorganic Chemistry Department, National Taras Shevchenko University of Kyiv, Volodymyrska Str. 64/13, 01601 Kyiv, Ukraine., Senchyk GA; Inorganic Chemistry Department, National Taras Shevchenko University of Kyiv, Volodymyrska Str. 64/13, 01601 Kyiv, Ukraine., Krautscheid H; Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, D-04103 Leipzig, Germany. |
| Jazyk: |
angličtina |
| Zdroj: |
Acta crystallographica. Section E, Crystallographic communications [Acta Crystallogr E Crystallogr Commun] 2023 Jun 20; Vol. 79 (Pt 7), pp. 657-663. Date of Electronic Publication: 2023 Jun 20 (Print Publication: 2023). |
| DOI: |
10.1107/S2056989023005339 |
| Abstrakt: |
In the structure of the title salt, [Li 2 (C 6 N 8 O 8 )(H 2 O) 4 ] n , the 3,3',5,5'-tetra-nitro-4,4'-bi-pyrazole-1,1'-diide dianion [{TNBPz} 2- ] is situated across the twofold axis. The distorted coordination octa-hedra around Li + involve four short bonds with two pyrazolate N atoms and two aqua ligands [Li-N(O) = 1.999 (3)-2.090 (2) Å] and two longer contacts with nitro-O atoms [2.550 (2), 2.636 (2) Å]. When combined with μ 4 -{TNBPz} 2- , this generates a mono-periodic polymeric structure incorporating discrete centrosymmeric [(H 2 O) 2 Li-(di-nitro-pyrazolato) 2 -Li(H 2 O) 2 ] units. The three-dimensional stack of mutually orthogonal coordination chains is reminiscent of a Lincoln log pattern. It is influenced by conventional hydrogen bonding [O⋯O = 2.8555 (17)-3.0010 (15) Å] and multiple lone pair-π hole inter-actions of the nitro groups [N⋯O = 3.0349 (15) and 3.0887 (15) Å]. The Hirshfeld surface and two-dimensional fingerprint plots also support the significance of non-covalent bonding. Coordinative saturation and a favorable geometry at the Li + ions, dense packing of the polymeric subconnectivities and particularly extensive inter-anion inter-actions may be involved in the stabilization of the structure. The title salt is a rare example of an energetic Li nitro-azolate, which nicely crystallizes from aqueous solution and is neither hygroscopic nor efflorescent. The TG/DTA data reveal total dehydration in the range of 330-430 K and stability of the anhydrous material up to 633-653 K.
(© Domasevitch et al. 2023.) |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
