Steric effects on the ortho-metalation reactions at binuclear pyrazolyl-bridged rhodium compounds. Molecular structure of Rh2(3,5-dmpz)2.mu.-P(o-C6F4)Ph2Br(CO)(.eta.2-PCBr)(H2O) 3,5-dmpz = 3,5-dimethylpyrazolyl; PCBr = P(o-BrC6F4)Ph2 | Synapse