Synthesis of vanadium–alkylidene complexes and their use as catalysts for ring opening metathesis polymerization
Reported examples for synthesis of vanadium–alkylidene complexes and some selected reactions have been summarized. (Imido)vanadium(V)–alkylidene complexes exhibit catalytic activities for ring-opening metathesis polymerization (ROMP) of cyclic olefins; V(CHSiMe3)(N-2,6-Cl2C6H3)(OC6F5)(PMe3)2 exhibited remarkable catalytic activities for ROMPs of norbornene derivatives, polymerized cyclopentene and cis-cyclooctene. Highly cis-specific (living) ROMPs of norbornene have been achieved by V(CHSiMe3)(N-2,6-X2C6H3)[OC(CF3)3](PMe3)2 (X = H, Cl), and the activity increased at high temperature (50 and 80 °C) without a decrease in cis specificity (98%) in the presence of PMe3.
- This article is part of the themed collection: 2017 Frontier and Perspective articles