ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 27, Number 5
JKCSEZ 27(5)
October 20, 1983 

It has been found that both of the iridium (Ⅰ) complexes, Ir(ClO4)(AN)(CO)(Ph3P)2(AN = CH2CHCN, Ph3P = (C6H5)3P) and [Ir(AN)(CO)(Ph3P)2]ClO4, react with Cl- to give IrCl(AN)(CO)(Ph3P)2, and [Ir(AN)(CO)(Ph3P)2]ClO4 dissociates AN to yield Ir(ClO4)(CO)(Ph3P)2 in the absence of excess AN added, and Ir(ClO4)(CO)(Ph3P)2 reacts with Cl- to produce IrCl(CO)(Ph3P)2. It is suggested that the catalytic polymerization of AN with Ir(ClO4)(AN)(CO)(Ph3P)2 proceeds through the formation of [(CO)(Ph3P)2Ir(-CH=CHCN)(H)(CH2=CHCN)]ClO4 followed by the formation of iridium(alkyl)(alkenyl) type complex which undergoes a reductive elimination to produce the polymer of acrylonitrile.