title: Carbon dioxide cleavage across a tungsten-alkylidyne bearing a trianionic pincer-type ligand.
abstract: The cleavage of carbon dioxide by the tungsten alkylidyne [CF3-ONO]W[triple bond, length as m-dash]CCtBu(THF)2(1) {where CF3-ONO = (MeC6H3[C-(CF3)2O])2N3-}, is reported. Splitting of CO2yields the tungsten oxo ketene complex [CF3-ONO]W(O){(CH3)3CC[double bond, length as m-dash]C[double bond, length as m-dash]O} (6). The proposed pathway occurs through initial cycloaddition of W[triple bond, length as m-dash]C and C[double bond, length as m-dash]O bonds to generate a heterometallacyclobutene, which then rearranges to yield W[triple bond, length as m-dash]O and C[double bond, length as m-dash]C bonds. Complex 6 was characterized by multinuclear NMR, IR, and single crystal X-ray diffraction.
authors.affiliation: University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, Florida 32611, USA. veige@chem.ufl.edu.
authors.forename: Stella A
authors.initials: SA
authors.lastname: Gonsales
authors.affiliation: University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, Florida 32611, USA. veige@chem.ufl.edu.
authors.forename: Ion
authors.initials: I
authors.lastname: Ghiviriga
authors.affiliation: University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, Florida 32611, USA. veige@chem.ufl.edu.
authors.forename: Khalil A
authors.initials: KA
authors.lastname: Abboud
authors.affiliation: University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, Florida 32611, USA. veige@chem.ufl.edu.
authors.forename: Adam S
authors.initials: AS
authors.lastname: Veige