SCHEDULED MAINTENANCE
Triazole vs. triazolium carbene ligands in the site-selective cyclometallation of o-carboranes by M(iii) (M = Ir, Rh) complexes†
María
Frutos, 
a
Mar
Gómez-Gallego,
*a
Elena A.
Giner,
a
Miguel A.
Sierra
*a
and
Carmen
Ramírez de Arellano
b
a
Mar
Gómez-Gallego,
*a
Elena A.
Giner,
a
Miguel A.
Sierra
*a
and
Carmen
Ramírez de Arellano
b
Abstract
Ir(III) and Rh(III)-mediated site-selective cage B–H and C–H bond activation in o-carboranylmethyl derivatives has been achieved. The selectivity of the reaction is related to the electron donating properties of the ligand. 1,2,3-Triazole-derivatives use the N2 position of the triazole ring to direct the selective o-carborane B–H bond activation, whereas the corresponding triazolylidene derivatives lead to the cage C–H bond activation with complete site-selectivity.
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