The Pentamethylcyclopentadienyl Ligand at Phosphorus or Arsenic – Effect on Small-Membered Rings and Double–Bond Species

Abstract

The versatility of the pentamethylcyclo-pentadienyl(Cp∗) ligand is based on its ability for kinetic stabilization and on its potential application as a leaving group^1,2,3. Here we report new results from the chemistry of diphosphenes and arsaphosphenes as well as of three– and four-membered ring systems. Concerning the Cp∗ reactivity, we have studied: I) nucleophilic substitution reactions, II) homolytic Cp∗[sbnd]El bond cleavages, and III) Cp∗ migration to Transition Metals.