Ruthenium (II) complexes of the chelating phosphine borane H2ClB · dppm

Reaction of H2ClB · PPh2CH2PPh2 (H2ClB · dppm) with [RuCp∗(NCMe)3][BAr4F](BAr4F=[B{3,5-(CF3)2C6H3}4]-) results in displacement of all three acetonitrile ligands and the formation of [RuCp∗(η2-H2ClB·dppm)][BAr4F] (1), which has been characterised crystallographically. Reaction with carbon monoxide results in a change from η2 to η1 of the borane ligand to afford [RuCp∗(CO)(η1-H2ClB·dppm)][BAr4F] (2). Compound 1 undergoes H/D exchange under a D2 atmosphere to afford [RuCp∗(η2-D2ClB·dppm)][BAr4F], while 2 does not.

[RuCp∗(η2-H2ClB·dppm)][BAr4F] has been synthesised, that contains the chelating phosphine borane ligand H2ClB · dppm. Reactions with CO and D2 are discussed.Figure optionsDownload as PowerPoint slide