Abstract
Bis[3-(dimethylarsino)propyl]phenylarsine, (tas), reacts with trans-Ir(CO)(EPh 3) 2 X (E = P, As; X = F, Cl, Br, I) to yield the (Ir(CO)(tas)] X complexes. In contrast, the similar ligand bis[3-(dimethylarsino)propyl]phenylphosphine, (dap), reacts with trans-Ir(CO)(EPh 3) 2X (E = P, As; X = Cl, Br, I) to yield a mixture of [Ir(CO)(dap)X] and [Ir(CO)(dap)]X, and with trans Ir(CO)(EPh 3) 2F (E = P, As) to yield solely [Ir(CO)(dap)F]. The cations [Ir(CO)(L)] + (L = tas, dap) readily yield tetraphenylborate derivatives, [Ir(CO)(L)]BPh 4. The oxygenation of [Ir(CO)(tas)] + in solution proceeds almost to completion after 15 h, whereas [Ir(CO)(dap)] + does not appear to undergo oxygenation.
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