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Carbon–Carbon Bond Formation at a Neutral Terminal Carbido Ligand: Generation of Cyclopropenylidene and Vinylidene Complexes
Author(s) -
Caskey Stephen R.,
Stewart Michael H.,
Johnson Marc J. A.,
Kampf Jeff W.
Publication year - 2006
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200601652
Subject(s) - norbornene , metathesis , chemistry , reagent , ring (chemistry) , ligand (biochemistry) , polymerization , molybdenum , carbon fibers , medicinal chemistry , stereochemistry , polymer chemistry , organic chemistry , materials science , biochemistry , receptor , composite number , composite material , polymer
A C 1 source , the carbido complex [Ru(C)(PCy 3 ) 2 Cl 2 ] ( 1 ) adds cleanly to dimethylacetylene dicarboxylate (DMAD), affording the cyclopropenylidene complex 2 (red O, green Cl, yellow P, gray C). This product is surprising given the instability of its trans ‐cyclopropylidene analogue. HX reagents effect 1,1‐addition and ring opening, forming vinylidene complexes such as 3 which catalyze the ring‐opening metathesis polymerization of norbornene.