B-H bond activation half-sandwich Ir and Ru complexes containing carboranylamidinate selenolate ligands

Several B-H activation half-sandwich iridium and ruthenium complexes based on carboranylamidinate selenolate ligands were successfully prepared. Treatments of carboranylamidine Cab(N)H (Cab(N)H: RN = C(closo-1,2-C2B10H11)(NHR), R = Pr-i, Cy), n-butyllithium, selenium powder and [Cp'MCl2](2) (Cp':Cp* or p-cymene; M: Ir or Ru) in dry THF, gave the corresponding products Cp'M[Se(RN = C(closo-1, 2-C2B10H9)(NHR)] 1-4, respectively. These B, N, Se-coordination mode complexes all adopted a three-legged piano-stool geometry and the metal centers showed a distorted octahedral environment. All complexes were fully characterized by elemental analysis and IR and NMR spectroscopy. The structures of 1, 2 and 4 were further confirmed by single-crystal X-ray analysis. (C) 2012 Elsevier B. V. All rights reserved.