Rapid vinyl shifts in spiro[4.4]polyenes: verification of the rate-determining step and the identity of the migrating group

Formation of Group 4 Metallocene-Enolate

Formation of Group 4 Metallocene-Enolate⋅B(C6F5)3 Adducts and Their Role as Initiators in the Rapid Polymerization of the Functionalized Olefin Methyl vinyl ketone

✍ Wolf Spaether; Katrin Klaß; Gerhard Erker; Frank Zippel; Roland Fröhlich 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 180 KB 👁 1 views

The Group 4 metallocene bis(enolate) complexes [Cp 2 M(-O-CMeCH 2 ) 2 ] (1) add one or two molar equivalents of the organometallic Lewis acid B(C 6 F 5 ) 3 to form the addition products (3), respectively. Complexes 3 a (M Ti) and 3 b (M Zr) were characterized by X-ray diffraction. Complexes 2 under