Del-'ot.t17zetrt of'Chet~~istq~, Ut~i~'rr.sity of' Wr.ste~.rr Ot~torio, Lot~dor~, 011to1,io Received November 27, 1972 The iridi~lm(II1) hydride, IrHCI2 {P(C2H5),},, gave 1 : I insertion products with perfl~~oropropene and 3,3,3-tdfluoropropynecontaining two and three phosphines per i r i d i~~m respectively. With tetrafluoroethylene, or 1,l-difluoroethylene a simple fluorine -hydridic hydrogen exchange reaction appears to occur. An unusual tricyanovinylic derivative is obtained as a major product of the reaction with tetracyanoethylene, while dimethylacetylene dicarboxylate gave an interesting p r o d~~c t containing two acetylene molecules per molecule of hydride. This is fornl~llated as the x-acetylenic complex of' the vinylic insertion product. The importance of ligand dissociation in these insertion processes is discussed. [Traduit par le journal]Can.

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IrC13(PEt3), is readily converted to IrHC12(CO)(PEt3)2 by treatment with carbon monoxide in hot acetone, ethanol, or 2-methoxyethanol. Perchlorate, tetrafluoroborate, and tetraphenylborate salts containing the [IrC12(CO)(PEt3)3]+ cation have been prepared, but attempts to obtain salts containing the [IrHCI(CO)(PEt,),]+ cation give only the neutral hydride, IrHC12(CO)(PEt3),. The reactions of [IrC12(CO)(PEt3)3]+ with ethanol, water, lithium aluminum hydride, aqueous potassium chloride solution, and sodium alkoxides are described.

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