Synthesis and Molecular Structure of a Tripodal Triaminostibine
β Scribed by Lutz H. Gade; Bernd Findeis; Olaf Gevert; Helmut Werner
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- German
- Weight
- 76 KB
- Volume
- 626
- Category
- Article
- ISSN
- 0372-7874
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β¦ Synopsis
Reaction of the tripodal trilithium triamide [MeSi{SiMe 2 N(Li)(p-Tol)} 3 (thf) 2 ] (1) with SbCl 3 in toluene gave the corresponding triaminostibine [MeSi{SiMe 2 N-(p-Tol)} 3 Sb] (2) in good yield. Its [2,2,2]bicyclooctane-related cage structure, comprising the trisilylsilane unit and the triamidostibine fragment, was established by a single crystal X-ray structure analysis: Space group P1, Z = 2, lattice dimensions at 293 K: a = 8.645(4), b = 10.029(5), c = 19.678(9) A Γ , a = 98.50(3)Β°, b = 97.46(3)Β°, c = 94.80(3)Β°, R = 0.0216.
π SIMILAR VOLUMES
extensively flatten the molecular skeleton around the nitrogen atoms and that the SiNSi angle (presumably near 120") will therefore change less than the CNC angle. 2) The 14N coupling constant of the tetrakis(trimethylsily1)hydrazine radical cation is at least 3 G smaller than that of analogous tet
Aryl a ## 6 b [111 Thus, the fact that all NMR signals appear only singly in 5. despite the unsymmetrical structure, cannot be explained in terms of a rapid rmgopening 5 + 4 and renewed conrotatory ring closure. The mechanism required from the Because of the trans arrangement of the sterically ve