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Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
Evaluation of Pd→B Interactions in Diphosphinoborane Complexes and Impact on Inner-Sphere Reductive Elimination
Florian Ritter1, Lukas John1, Tobias Schindler1
1Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1A, 52074, Aachen, Germany.
Abstract:
The dative Pd→B interaction in a series of R DPBR' Pd0 and PdII complexes (R DPBR' =(o-PR2 C6 H4 )2 BR', diphosphinoborane) was analyzed using XRD, 11 B NMR spectroscopy and NBO/NLMO calculations. The borane acceptor discriminates between the oxidation state PdII and Pd0 , stabilizing the latter. Reaction of lithium amides with [(R DPBR' )PdII (4-NO2 C6 H4 )I] chemoselectively yields the C-N coupling product. DFT modelling indicates no significant impact of PdII →B coordination on the inner-sphere reductive elimination rate.
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