The oxadiborirane 1 is unexpectedly unreactive. In this molecule the almost linear CBBC chain and very short BB distance agree with predictions based on ab initio calculations that suggest that 1 is a diborane(2) RBBR with a side‐on coordinated O atom. Compound 1 is formed according to Equation (a) in 54 % overall yield. M = Na/K alloy.
Unerwartet wenig reaktiv ist das Oxadiboriran 1, dessen nahezu lineare C‐B‐B‐C‐Kette und dessen sehr kurze B‐B‐Abstand mit den Voraussagen von ab‐initio‐Rechnungen übereinstimmen und nahelegen,I als ein Diboran(2) RBBR mit side ‐ on‐koordiniertem O‐Atom zu verstehen,I entsteht gemäß Gleichung (a) in 54% Gesamtausbeute. MNa/K‐Legierung.
1992organo-boron compounds, nonmetal heterocycles organo-boron compounds, nonmetal heterocycles S 0047
-204Bis(trisyl)oxadiborinane. -Starting with the chloroborane (I) the diboryl oxide (II) is obtained which, on reduction, leads to the title compound (III) for the first time. An X-ray analysis (C2/c, Z = 4) confirms the three-membered ring structure. Ab initio calculations suggest that (III) is a diborane(2) with a side-on coordinated O atom. The compound is unexpectedly unreactive. -(PAETZOLD, P.; GERET-BAUMGARTEN, L.; BOESE, R.; Angew. Chem.
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