| Abstract |
Complex fac-[Re\kappa(3)-H(mu-H)(2)B(tim(Me))\(CO)(3)] (1) (tim(Me) = 2-inercapto-1-methylinzidazolyl) promptly reacts with the neutral substrates PPh3, (BuNC)-Bu-t and EtOOCCH2NC yielding fac-[Re\kappa(2)-H-2(mu-H)B(tim(Me))](L)(CO)(3)] (L = PPh3(2), ((BuNC)-Bu-t) (3), (EtOOCCH2NC) (4)). Complexes 2-4 have been fully characterized, including by variable-temperature NMR studies and X-ray diffraction analysis in the case of 2. Unlike 1, complexes 2-4 are fluxional in solution undergoing a dynamic process that accounts for the magnetic equivalence of all the B-H hydrogen atoms at room temperature. Compounds I and 2 were studied by DFT methods to explain the different solution behavior of the complexes anchored by (kappa(2)-H,S) and (kappa(3)-H,H ,S) soft scorpionates. |
