Premium
A Highly Lewis Acidic Strontium ansa ‐Arene Complex for Lewis Acid Catalysis and Isobutylene Polymerization
Author(s) -
Dabringhaus Philipp,
Schorpp Marcel,
Scherer Harald,
Krossing Ingo
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202010019
Subject(s) - isobutylene , lewis acids and bases , chemistry , strontium , catalysis , metathesis , polymerization , lewis acid catalysis , polymer chemistry , salt (chemistry) , medicinal chemistry , organic chemistry , copolymer , polymer
The potential of a dicationic strontium ansa ‐arene complex for Lewis acid catalysis has been explored. The key to its synthesis was a simple salt metathesis from SrI 2 and 2 Ag[Al(OR F ) 4 ], giving the base‐free strontium‐perfluoroalkoxyaluminate Sr[Al(OR F ) 4 ] 2 (OR F =OC(CF 3 ) 3 ). Addition of an ansa ‐arene yielded the highly Lewis acidic, dicationic strontium ansa ‐arene complex. In preliminary experiments, the complex was successfully applied as a catalyst in CO 2 ‐reduction to CH 4 and a surprisingly controlled isobutylene polymerization reaction.