Add time:08/11/2019         Source:sciencedirect.com

The synthesis of two new WOCl4 derivatives that contain fluorinated aryloxide ligands are reported, along with a description of their behavior as precatalysts in the metathesis polymerization of hydrocarbon dienes and cycloolefins. Crystal data for trans-bis(2,6-dibromo-4-fluorophenoxy)tungsten (VI) oxychloride (4): Space group P21/c, monoclinic, a=15.1172 (2) Å, b=7.9837 (1) Å, c=16.6186 (1) Å, β 112.7430 (10)°, V=1849.77 (4) Å3. R1=0.0240 and wR2=0.0598. Complex 4 catalyzes olefin metathesis when activated by Bu4Sn or Bu3SnH at 85 and 65°C respectively. Bis(pentafluorophenoxy)tungsten (VI) oxychloride (5) decomposes when exposed to the same experimental conditions.

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