Organo-di-Lithio Reagents: Cooperative Effect and Synthetic Applications -- New Formulas for Zincate Chemistry: Synergistic Effect and Synthetic Applications of Hetero-bimetal Ate Complexes -- FascinATES: Mixed-metal ate compounds that function synergistically -- Transmetallation of Zirconacycles to Other Metals for Organic Synthesis -- [Li,Li]-Mixed Aggregates: Synergy Between Chiral Lithium Amides and Methyllithium or Butyllithium -- Organometallic Chemistry with Dianionic Pincer Ligands -- Geminal Dianions as Precursors of Carbene Complexes.