An OCO3- trianionic pincer tungsten(VI) alkylidyne: rational design of a highly active alkyne polymerization catalyst.

Soumya Sarkar, Kevin P McGowan, Subramaniam Kuppuswamy, Ion Ghiviriga, Khalil A Abboud, Adam S Veige

Index: J. Am. Chem. Soc. 134(10) , 4509-12, (2012)

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Abstract

Synthesis, characterization, and catalytic alkyne polymerization results for the first trianionic pincer alkylidyne complex, [(t)BuOCO]W≡CC(CH(3))(3)(THF)(2) (6), are described. Complex 6 is a highly active catalyst for the polymerization of acetylenes and exhibits a high turnover number (4371), activity (1.05 × 10(6) g(PPA) mol(cat)(-1) h(-1)),and yield (87%) for the polymerization of 1-ethynyl-4-fluorobenzene.