(N-Pyrrolyl)B(C6F5)2-A New Organometallic Lewis Acid for the Generation of Group 4 Metallocene Cation Complexes

Protonation of the Heterocyclic Cp-Anion

Protonation of the Heterocyclic Cp-Anion Equivalent [Pyrrolyl-B(C6F5)3]Li − Formation of a Useful Neutral Brønsted Acid for the Generation of Homogeneous Metallocene Ziegler Catalysts

✍ Gerald Kehr; Rolf Roesmann; Roland Fröhlich; Christiane Holst; Gerhard Erker 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 290 KB 👁 1 views

N-pyrrolyllithium (1) adds to B(C 6 F 5 ) 3 to yield [(C 4 H 4 N)B(C 6 F 5 ) 3 ]Li (3). The corresponding monoetherate (3•OEt 2 ) was characterized by X-ray diffraction and shows an η 5 coordination of the pyrrolyl moiety to the lithium cation. Treatment of 3 with HCl in ether leads to H + addition