Reactivity of Diaryliodine(III) Triflates toward Palladium(II) and Platinum(II): Reactions of C(sp2)-I Bonds to Form Arylmetal(IV) Complexes; Access to Dialkyl(aryl)metal(IV), 1,4-Benzenediyl-Bridged Platinum(IV), and Triphenylplatinum(IV) Species; and Structural Studies of Platinum(IV) Complexes

The reactivity of diaryliodine(III) triflates toward palladium(II) and platinum(II) is discussed. The reactions mirror, for Pd(II)/Pd(IV), the role of iodine(III) reagents in catalysis reactions involving Pd(0)/Pd(II) cycles. The facile synthesis and stability at ambient temperature of PtIPh 3(Bu2 tbpy) indicate that it should be possible to develop an extensive chemistry of triarylplatinum(IV) species in the absence of intramolecular coordination by the aryl groups. Transfer of aryl cations from [Ar2I]+ to organic and organometallic reagents containing a nucleophilic center occurs via nucleophilic attack at the iodine(III) center.