Experimental and Computational Evidence for 1,4-Diradical Intermediates in Reactions of Cobalt Fluorocarbene Complexes with Terminal Aryl-alkynes to give Metallacyclobutenes
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DOI: 10.1021/acs.organomet.7b00344
Abstract: Cobalt fluorocarbene complex CpCo(═CF(CF3))(PPh2Me) (Cp = η5-cyclopentadienyl) reacts with para-substituted phenylacetylenes to furnish partially fluorinated cobaltacyclobutene complexes [Cp(PPh2Me)Co{κ2-C(Ar)═CHCF(CF3)}], which were isolated and characterized by elemental analysis, multinuclear NMR and UV–vis spectroscopy, and X-ray crystallography. The… read more here.
Keywords: computational evidence; cobalt fluorocarbene; diradical intermediates; evidence diradical ... See more keywords
The Fluorocarbene Exploit: Enforcing Alternation in Ring-Opening Metathesis Polymerization.
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DOI: 10.1021/jacs.2c11373
Abstract: Fluoroalkenes are known to be notoriously reluctant substrates for olefin metathesis due to the generation of thermodynamically stable Fischer-type fluorocarbene intermediates, which invariably fail to undergo further reaction. In the present disclosure, we find that… read more here.
Keywords: metathesis; metathesis polymerization; opening metathesis; fluorocarbene ... See more keywords