Carbene-induced synthesis of the first borironium cations using the [(η(5)-C5Me5)Fe(CO)2](-) anion as an unlikely leaving group.
Reaction of N-heterocyclic carbenes with ferroborirene complex [{(η(5)-C5Me5)Fe(CO)2}{BC2(SiMe3)2}] results in heterolytic Fe-B bond cleavage, yielding borironium ions, a new class of boron-containing heterocycles. The reaction rests on the surprising ability of the reactive [(η(5)-C5Me5)Fe(CO)2](-) anion to act as a leaving group. The properties of these species were investigated by multinuclear NMR spectroscopy, as well as single-crystal X-ray diffraction.
Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@uni-wuerzburg.de.
Holger
H
Braunschweig
Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@uni-wuerzburg.de.
Rian D
RD
Dewhurst
Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@uni-wuerzburg.de.
Katharina
K
Ferkinghoff