Latent, high-activity olefin metathesis catalysts containing an N-heterocyclic carbene ligand
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United States of America Patent
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Issued Date -
Nov 24, 2005
app pub date -
Mar 29, 2005
filing date -
Mar 29, 2004
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Abstract
The invention provides novel organometallic complexes useful as olefin metathesis catalysts. The complexes have an N-heterocyclic carbene ligand and a chelating carbene ligand associated with a Group 8 transition metal center. The molecular structure of the complexes can be altered so as to provide a substantial latency period. The complexes are particularly useful in catalyzing ring closing metathesis of acyclic olefins and ring opening metathesis polymerization of cyclic olefins.
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