Synthesis, Structure, and Olefin Metathesis Activity of Two Ruthenium Monofluoromethylidene Complexes

Abstract

The monofluoromethylidene complexes Ru( CHF)(H 2 IMes)(PCy 3 )Cl 2 ( 10 ) and Ru( CHF)(H 2 IMes)(py) 2 Cl 2 ( 11 ) have been synthesized from Ru( CHPh)(H 2 IMes)(PCy 3 )Cl 2 and Ru( CHPh)(H 2 IMes)(py) 2 Cl 2 via reaction with β-fluorostyrene. Both 10 and 11 catalyze ring-closing metathesis and cross-metathesis with activity comparable to that of Ru( CHOEt)(H 2 IMes)(PCy 3 )Cl 2 .