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Die Kristall­ struktur von [CollH] 2  [AsF 6 ][As 2 F 11 ] (Coll = 2,4,6-Trimethylpyridin) Collidinium and Imidazolium Salts of Fluorine-Containing Anions. The Crystal Structure of [CollH] 2 [AsF 6 ][As 2 F 11 ] (Coll = 2,4,6-Trimethylpyridine) From s-Collidine (1, Coll) and aqueous HF compounds of the composition Coll · n HF (n = 1 -2) are formed which are transformed to [CollH] +  [HF 2 ] -  (2) by sublimation. [CollH] 2 [AsF 6 ][As 2 F] J (3) is obtained from 1 and the superacid system HF/AsF5. 2 reacts with 2,3-dihydro-l,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (4, Im) to give the imidazo­ lium salt [ImH] +  [HF 2 ] -  (5). Hydrogen bonds in the crystal structure of [CollH] 2 [AsF 6 ][As 2 Fn ] (3) are discussed.

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Collidinium- und Imidazolium-Salze Fluor-haltiger Anionen. Die Kristallstruktur von [CollH] 2  [AsF 6 ][As 2  F 11 ] (Coll = 2,4,6-Trimethylpyridin) / Collidinium and Imidazolium Salts of Fluorine-Containing Anions. The Crystal Structure of [CollH] 2 [AsF 6 ][As 2 F 11 ] (Coll = 2,4,6-Trimethylpyridine)