Reactions of zirconium amide amidinates with dioxygen. Observation of an unusual peroxo intermediate in the formation of oxo compounds†
Abstract
Reaction of d0 Zr(NMe2)2[MeC(NiPr)2]2 (1) with O2 at −30 °C gives three Zr containing products: a peroxo trimer {(μ-η2:η2-O2)Zr[MeC(NiPr)2]2}3 (2), an oxo dimer {(μ-O)Zr[MeC(NiPr)2]2}2 (3), and an oxo polymer {(μ-O)Zr[MeC(NiPr)2]2}n (4). 2 is a rarely observed peroxo complex from the reaction of a d0 complex with O2.