Protonation of (cyclohexadiene)(cyclopentadienyl)rhodium(I). Evidence for endo-proton addition
Abstract
The protonation of (cyclohexadiene)(cyclopentadienyl)rhodium(I), has been shown to proceed with metal–hydrogen interaction via a π-allylic cation to yield the endo-substituted product; the stereochemistry of the product has been established by deuteriation, coupled with studies on trityl and hydride ion attack on the diene and dienyl salt, respectively.