Chelating phosphane-boranes as hemilabile ligands - Synthesis of [Mn(CO)32-H3B·dppin)][BArF4 ] and [Mn(CO)41-H3B· dppm)][BArF4]

N. Merle, C.G. Frost, Gabriele Kociok-Kohn, Michael C Willis, A.S. Weller

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11 Citations (Scopus)

Abstract

Manganese complexes bearing the chelating phosphane–borane ligand H3B·dppm [dppm = bis(diphenylphosphanyl)methane] have been prepared. Addition of H3B·dppm to Mn(CO)5Br using Na[BArF4] as a halide-abstracting reagent affords [Mn(CO)3(η2-H3B·dppm)][BArF4] (1). This reacts with CO to open the bidentate borane to afford [Mn(CO)4(η1-H3B·dppm)][BArF4] (2) in which the borane is now bound in a monodentate manner. The CO addition is reversible, and placing 2 under vacuum (hours) regenerates 1 quantitatively, demonstrating that the chelating phosphane–boranes can act as hemilabile ligands. The complexes 1 and 2 have been fully characterised by NMR spectroscopy and X-ray crystallography.
Original languageEnglish
Pages (from-to)4068-4073
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Volume2006
Issue number20
DOIs
Publication statusPublished - 16 Oct 2006

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