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Arylallenes such as (4-methylphenyl)allene, phenylallene, and (4-bromophenyl)allene react with IrH(CO)(PPh3)3 to give the π-allyliridium(I) complexes, Ir(η3-CH2CHCHAr)(CO)(PPh3)2 (Ar=C6H4Me-p, Ph, and C6H4Br-p). Crystallographic studies of the complexes showed a similar coordination geometry to that of Rh(η3-CH2CHCHX)(CO)(PPh3)2. An equimolar reaction of phenylacetylene with Ir(η3-CH2CHCHC6H4Me-p)(CO)(PPh...
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