| | 1 | Author
| Norbert Kuhna, Stefan Fuchs3, Rolf Minkwitzb, Thorsten Berendsb, Herrn Professor, DrH P Fritz | Requires cookie* | | | Title
| Collidinium-und Imidazolium-Salze Fluor-haltiger Anionen  | | | | Abstract
| Die Kristall struktur von [CollH]2 [AsF6][As2 Fu ] (Coli = 2,4,6-Trimethylpyridin) Collidinium and Imidazolium Salts of Fluorine-Containing Anions. The Crystal Structure of [CollH]2[AsF6][As2Fl l ] (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]+ [HF2]~ (2) by sublimation. [CollH]2[AsF6][As2F] 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]+ [HF2]~ (5). Hydrogen bonds in the crystal structure of [CollH]2[AsF6][As2Fn ] (3) are discussed. | | | |
Reference
| Z. Naturforsch. 56b, 626—629 (2001); eingegangen am 3. Mai 2001 | | | |
Published
| 2001 | | | |
Keywords
| Hydrogen Fluoride, Imidazoles, Pyridines | | | |
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| default:Reihe_B/56/ZNB-2001-56b-0626.pdf | | | | Identifier
| ZNB-2001-56b-0626 | | | | Volume
| 56 | |
| 2 | Author
| R. O. Horenian, W. Weyrich | Requires cookie* | | | Title
| Momentum-Density Studies of Some Compounds with Triatomic Linear Anions | | | | Abstract
| High-purity powder samples of lithium and sodium azide (LiN 3 , NaN 3), cyanate (LiOCN, NaOCN) and hydrogen fluoride (LiFHF, NaFHF) were studied by means of 59.54 keV Compton spectroscopy. The measured isotropic Compton profiles were corrected for multiple scattering and transformed to spherically averaged reciprocal form factors B a (s). The experimental results are compared with theoretical reciprocal form factors obtained from Hartree-Fock calculations with different types of basis sets (Gaussian-and Slater-type orbitals, with and without polarisation functions) both for the free ions and for several kinds of clusters. The importance of intraionic and interionic interaction for the description of chemical bonding in these compounds is pointed out and discussed. | | | |
Reference
| Z. Naturforsch. 48a, 325—333 (1993); received January 28 1993 | | | |
Published
| 1993 | | | |
Keywords
| Compton spectroscopy, Azides, Hydrogen fluorides, Cyanates, Ionic crystals | | | |
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| default:Reihe_A/48/ZNA-1993-48a-0325.pdf | | | | Identifier
| ZNA-1993-48a-0325 | | | | Volume
| 48 | |
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