Enthalogenierung von Bis(diisopropylamino-chlorboryl)methan: Lösungsmittelabhängige Bildung eines 1,2,4,5-Tetraborinan-und eines 1-Aza-2,4-diborolidin-Derivats / Dehalogenation of Bis(diisopropylamino-chloroboryl)methane: Solvent-dependent Formation of a 1,2,4,5-Tetraborinane and of a 1-Aza-2,4-diborolidine Derivative

Dehalogenation of bis(diisopropylamino-chloroboryl)methane 1 b with sodium/potassium alloy in petroleum ether yields the 1,2,4,5-tetraborinane 2b (38%), whereas in tetrahydrofuran the five-membered 1-aza-2,4-diborolidine derivative 3a (36%) is formed. The constitution of 2b and 3a follows from spectroscopic data and has been confirmed by X-ray structure analyses.