Zur Reaktion von Diboran mit Grignard-Verbindungen in Gegenwart von Äthern / Concerning the Reaction of Diborane with Grignard-Reagents in Ether Solutions
Open Access
- 1 August 1970
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 25 (8) , 780-786
- https://doi.org/10.1515/znb-1970-0803
Abstract
The reaction between diborane and solutions of RMgX (R = CH3, C2H5, C6H5CH2; X = Cl, Br, J) in ether or tetrahydrofurane (THF) has been studied. The magnesium halide tetrahydridoborates are formed which can be readily isolated from THF solutions as the crystalline solvates MgX (BH4) · 2 THF. Species of the type RBH3 ⊖ and R2BH2 ⊖ but not R3BH⊖ can be detected by means of 11B nmr spectroscopy in solutions containing excess RMgX; they represent intermediates in the BH4 ⊖ producing steps. However, contrary to the literature, no hydridomagnesiumhalides, HMgX, could be isolated in a pure state and only for the case X = Cl was it possible to obtain mixtures of MgCl2 with MgH-containing species, both solvated. from THF solutions.Keywords
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