Novel Initiators for Thermally and UV‐Triggered ROMP

Novel ruthenium‐based photoactive transition metal catalysts, i.e. [Ru(CF 3 CO 2 ) 2 ( p ‐cymene)(IMes)] ( 2 ), [Ru(CF 3 CO 2 ) 2 (PhNC) 3 (IMes)] ( 3 ), [Ru(CF 3 CO 2 ) 2 ( p ‐cymene) (IMesH 2 )] ( 4 ), [Ru(CF 3 CO 2 ) 2 (PhNC)) 3 (IMesH 2 )] ( 5 ), have been prepared and investigated for their use as initiators for the thermally and photo‐initiated ring‐opening metathesis polymerization (photo‐ROMP). The polymerization behavior of the novel systems for both norborn‐2‐ene and functional monomers, such as norborn‐5‐ene‐ 2‐ylmethanol, has been investigated.