| Abstract: | Some mono‐ and dinuclear Hydroxoiridium(I) Complexes The chloro‐bridged iridium(I) compound Ir2(μ‐Cl)2(C8H14)4] ( 1 ) reacts in the biphasic system benzene/water with KOH in the presence of NEt3(CH2Ph)]Cl (TEBA) to give the corresponding dinuclear complex Ir2(μ‐OH)2(C8H14)4] ( 2 ). Stepwise substitution of the cyclooctene ligands by PiPr3 and ethene affords via the intermediate Ir2(μ‐OH)2(C8H14)2(PiPr3)2] (isolated as a mixture of isomers 3 a , b ) the product Ir2(μ‐OH)2(C2H4)2(PiPr3)2] ( 4 ) in excellent yield. Reaction of 4 with PiPr3in the molar ratio of 1:2 leads to the formation of the mononuclear compound trans‐Ir(OH)(C2H4)(PiPr3)2] ( 5 ), the ethene ligand of which cannot be replaced by CPh2 upon treatment with Ph2CN2. |
