posted on 2016-02-21, 13:57authored byRichard
J. Burford, Warren E. Piers, Masood Parvez
The synthesis of two members of a new PCP pincer ligand
family
and their complexation with iridium has been developed. Double C–H
activation results in a ligand anchored by a carbene donor; hydrogen
reversibly adds to the (PCcarbeneP)IrCl complexes 3R (R = iPr, tBu). Aryl, amido, and phenoxy derivatives are available from the
chlorides via salt metathesis. These compounds add H2 and
eliminate H–X; the iridium compound is trapped as a PCalkylP iridium polyhydride.