Abstract
The oxidative addition reaction of tetrachloro-1,2-benzoquinone with trans-{IrCl(N2)[P(C6H5)3]2} yields the coordinatively unsaturated complex {IrCl(o-O2C6Cl4)[P(C6H5)3]2} · C6H6 Carbonylation of this complex can be used to prepare two isomers of formula {IrCl(o-O2C6Cl4)(CO)[P(C6H5)3]2}. These are both different than the isomer obtained by Balch and Sohn from the oxidative addition of the quinone to Vaska's compound. The role of coordinatively unsaturated intermediates in the isomerization reactions of the octahedral carbonyl complexes will be discussed. The five coordinated o-quinone complex reacts with water to give an aquo complex. Two criteria for distinguishing cis- and trans-M[P(C6H5)3]2 geometries from intensifies of IR bands in the regions 15701590 and 530550 cm−1 have been tested for octahedral complexes. cis-Ph3P octahedral complexes of iridium(III) have a band of high intensity in the 534541 cm−1 region. There is no systematic relationship between the band intensities in the 15701590 cm−1 region and phosphine geometry.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call