Deuterium exchange at terminal boron-hydrogen bonds catalyzed by certain transition metal complexes. A qualitative study of selectivity and mechanism

Iridium-catalysed regioselective borylation of carboranes via direct B–H activation

“…On the basis of the aforementioned experimental results and literature work303645464748495051525354555657, a proposed mechanism for the borylation reaction is shown in Fig. 5.…”

“…In contrast, transition metal-catalysed B(3,6)-difunctionalization of o -carboranes is much less studied3637, although transition metal promoted B(3)–H activation in o -carboranes has been well documented38394041424344.…”

Boron nanostructures – from materials to cancer therapy: An account

“…It has been observed that transition metals such as Ru, Os, Ir, Rh, could interact with boron clusters to form metal-boron (M-B) bonds, and thus activate B-H bonds [12]. In addition, carboranes and boron hydrides were found to undergo catalytic isotopic exchange of their terminal hydrogens with deuterium gas in the presence of the (PPh 3 ) 3 RuHCl catalyst [13]. These examples of B-H activation and the enhanced catalytic activity of nanoscale metal particles led us to investigate the possibility of synthesizing 10 B enriched decaborane (14) via isotope exchange between natural abundant decaborane (14) and 10 B enriched diborane, in the presence of Ru (0) nanoparticles as catalysts [14].…”

Nano and dendritic structured carboranes and metallacarboranes: From materials to cancer therapy

“…Transition metals such as Ru, Os, Ir, and Rh, were found to activate B-H bonds in boron clusters to form metal-boron (M-B) bonds [12]. Also, carboranes and boron hydrides were found to undergo catalytic isotopic exchange of their terminal hydrogens with deuterium gas in the presence of (PPh 3 ) 3 RuHCl as catalyst [13]. In view of these examples of B-H activation and the enhanced catalytic activity of nanoscale metal particles, we investigated the possibility of synthesizing 10 B enriched decaborane (14) via isotope exchange between natural abundant decaborane (14) and 10 B enriched diborane, in the presence of Ru(0) nanoparticles as catalysts [14].…”