Kristallstrukturen komplexer Metalate mit dem sterisch anspruchsvollen 1,3,5-Tri(tert-butyl)tropylium-Kation / X-Ray Crystal Structures of Complex Metallates Containing the Sterically Demanding 1,3,5-Tri(tert-butyl)tropylium Cation
| Autor: | Olga Kataeva, Victoria Urban, Matthias Tamm, Tania Pape, Thomas Bannenberg |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Zeitschrift für Naturforschung B. 61:1189-1197 |
| ISSN: | 1865-7117 0932-0776 |
| DOI: | 10.1515/znb-2006-1001 |
| Popis: | The X-ray crystal structures of anionic transition metal complexes containing the sterically demanding 1,3,5-tri-tert-butyltropylium cation, [1,3,5-C7H4tBu3]+, as the compensating ion are presented. Bis(1,3,5-tri-tert-butyltropylium) hexachlorodiferrate(II), [1,3,5-C7H4tBu3]2[Fe2Cl6] (4), was obtained from the reaction of the 1,3,5-tri-tert-butyltropylium hydrogendichloride, [1,3,5- C7H4tBu3][HCl2] (3), with FeCl2, whereas the 1,3,5-tri-tert-butyltropylium tetrabromooxomolybdate( V) [1,3,5-C7H4tBu3][trans-Mo(O)Br4(CH3CN)] (7) was isolated from the reaction of the cycloheptatrienyl complex [(η7-1,3,5-C7H4tBu3)Mo(CO)2Br] (6) with elemental bromine. The crystal structures of 3, 4, 7 and 7 · CH3CN show in each case well separated anions and cations and the absence of any covalent anion-cation interactions. However, close inspection of the crystal packing reveals that the 1,3,5-tri-tert-butyltropylium cation can act as a CH-proton donor towards the counterion leading to the formation of weak C-H· · ·Cl-M and C-H· · ·O=M hydrogen bonds in 4 and in 7 and 7 ·CH3CN, respectively. |
| Databáze: | OpenAIRE |
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