In this paper the synthesis and characterisation of ruthenium dihydrogen complexes bearing rigid aliphatic PNP pincer-type ligands are described. As one result hydride complexes were synthesised in good to high yields by a one-pot direct hydrogenation reaction. As another finding the dihydrogen complex, stabilised with a N-Me group in the ligand frame, can be converted with dimethylamine borane into a rare sigma-boron complex [RuH2(BH3)(Me-PNP)] with rapid B-N decoupling. Additionally, we present the first mass spectrometric analysis of the synthesised sigma-complexes via liquid injection field desorption/ionisation technique (LIFDI-MS).
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Choi, J-H., Schloerer, N. E., Berger, J., & Prechtl, M. H. G. (2014). Synthesis and characterisation of ruthenium dihydrogen complexes and their reactivity towards B-H bonds. Dalton Transactions, 43(1), 290-299. https://doi.org/10.1039/c3dt52037d