Transanular Interactions in Difunctional Medium Rings, 5. Spectroscopic Investigations of Bicyclic Boraamines

✍ Scribed by Wiesmann, Reinhard F. ;Rademacher, Paul

• Book ID: 102790672
• Publisher: Wiley (John Wiley & Sons)
• Year: 1994
• Tongue: English
• Weight: 566 KB
• Volume: 127
• Category: Article
• ISSN: 0009-2940
• DOI: 10.1002/cber.19941270620

✦ Synopsis

methyl]-/ 2-Azonia-l-boratatricyclo[4.3.1. 14,8]undecanes / Borane-amine complex formation / Photoelectron spectra / Conformational analysis / Transanular interaction Theendo-?-[(dialkylamino)methy1]-3-borabicyclo[3.3.l]nonanes 1 and 2 have been synthesized and their intramolecular complex formation of the corresponding 2-azonia-1-borata-tricycl0[4.3.l.l~~~]undecanes 3 and 4 has been studied in the gas phase by UV photoelectron spectroscopy and in solution by llB-NMR spectroscopy. Deviations of the characteristic spectral features from those of the monofunctional bicyclic boranes 5 and amines 6 and 7 indicate that in the gas phase the (dimethy1amino)boranes with a B-alkyl substituent adopt the tricyclic form 3a-c whereas the diethylamino and the Bmethoxy derivatives l e and 2 prefer the bicyclic structure. In solution some deviations from this behavior are observed.