REACTIONS OF IRIDIUM(III) COMPOUNDS WITH ALKYNES IN THE PRESENCE OF TRIETHYLAMINE - THE FIRST EXAMPLE OF M-CH=CH-(+)NR(3)

Reactions of the iridium(III) compounds [Ir(H)-(-C=CPh)(PhCN)L(3)](+) (1) and [Ir-CH=CHCH=CH)-(PhCN)L(3)](+) (2) (L(3) = (CO)(PPh(3))(2)) wi th HC=CH in the presence of NEt(3) produce the acetylene-inserted prod ucts [Ir(H)(-C=CPh)(-CH=CH-(+)NEt(3))L(3)](+) (3) and [Ir-CH=CHCH=CH)( -CH=CH-(+)NEt(3))L(3)](+) (4), while those with HC=CPh give the alkyny l complexes Ir(H)(-C=CPh)(2)L(3) (5) and Ir-CH=CHCH=CH)-(-C=CPh)L(3) ( 6).