✍ Scribed by Kölle, Peter ;Nöth, Heinrich ;Stolpmann, Holger ;Thomann, Martina
No coin nor oath required. For personal study only.
Borane, (di-tert-butylphosphanyl)imino dimer / Phosphonium, di-tert-butyl-methy1[(2,2,6,6-tetramethylpiperidinoborylene)imino]iodide / Haloboration / Hydroboration / Metal carbonyl complexes of (di-ter~-butylphosphanyl)iminoborane
The elements oxygen, sulfur, and selenium add to the P atom of the title borane 1. In contrast to the formation of tmp-B-N-P(X)tBuz (X = S, Se), the P oxide (X = 0) dimerizes to [tmp-B=N-P(0)fBu2J2 (5) with an eight-membered flat boat-shaped B2N2P202 ring. Borane 1 reacts readily with Me1 to yield a phosphonium salt 8 and with BBr, to give a n adduct 9 with a B-P bond. In contrast, bis(dichlorobory1)methane not only adds to 1 to generate a coordinate B-P bond but also chloroborates the BEN triple bond, the final product being a new five-membered heterocycle 10. Similarly, the BH3 component of BH3 . SMez first adds to the P atom of 1 followed by reaction of a second mol of BH3 . SMez which hydroborates the BEN triple bond. Finally, metal car-bony1 fragments add only to the P atom of 1, demonstrating also that the chemistry of the molecule 1 is dominated by the basicity of its P center.
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