1,2,3-Triborolane aus Norbornenderivaten, Allylbenzol und Dehalogenierungsprodukten von Dichlor(diisopropylamino)boran; 2,4,5-Tris(diisopropylamino)-2,4,5-triborabicyclo[1.1.1]pentan-Bicyclus oder Carboran?
✍ Scribed by Bromm, Dietmar ;Seebold, Uwe ;Noltemeyer, Mathias ;Meller, Anton
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1991
- Tongue
- English
- Weight
- 442 KB
- Volume
- 124
- Category
- Article
- ISSN
- 0009-2940
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✦ Synopsis
1,2.3-Triborolanes from Norbornene Derivatives, Allylbenzene and Dehalogenation Products of Dichloro(diisopropy1amino)borane; 2.4,5-Tris(diisopropylamino)-2.4.5-triborabicyclo[l.l.l]pentane -Bicyclus or Carborane? The new 1,2,3-tris(diisopropylamino)triborolanes 1. 2, 3 and 4 have been prepared by treatment of mixtures of 2-norbornene (A), 5-methylene-2-norbornene (B), 5-ethylidene-2-norbornene (C) and allylbenzene (D) with dichloro(diisopropylamino)borane with Na/K alloy in hexane. The corresponding species 5, derived from 2,5-norbornadiene (E), is relatively unstable and by a retro Diels-Alder reaction gives 2,3,4-tris(diisopropylamino)-l,5-dicarba-closo-pentaborane(5) (6). The compounds are characterized by chemical analyses, MS and NMR ('H, "B, I3C, lSN) and 1, 4 and 6 also by X-ray structure analyses.
* U(eq) berechnet als ein Drittel der Spur des orthogonalen U,, -Tensors.