E Anastasia K Spearing-Ewyn, Nicholas A Beattie, Annie L Colebatch, Antonio J Martinez-Martinez, Andrew Docker, Timothy M Boyd, Gregg Baillie, Rachel Reed, Stuart A Macgregor, Andrew S Weller
The σ-amine-borane pincer complex [Rh(PONOP)(η1-H3B·NMe3)][BArF4] [2, PONOP = κ3-NC5H3-2,6-(OPtBu2)2] is prepared by addition of H3B·NMe3 to the dihydrogen precursor [Rh(PONOP)(η2-H2)][BArF4], 1. In a similar way the related H3B·NMe2H complex [Rh(PONOP)(η1-H3B·NMe2H)][BArF4], 3, can be made in situ, but this undergoes dehydrocoupling to reform 1 and give the aminoborane dimer [H2BNMe2]2. NMR studies on this system reveal an intermediate neutral hydride forms, Rh(PONOP)H, 4, that has been prepared independently...
September 20, 2019: Dalton Transactions: An International Journal of Inorganic Chemistry