title: Nucleophilic scandium carbene complexes.
abstract: Using a geminal dianion as precursor, a nucleophilic scandium carbene complex (2) has been synthesized by salt metathesis on ScCl(3)(THF)(3) in 52% isolated yield. The X-ray structure as well as an NBO analysis points to a double interaction between the carbon and the scandium atoms. Quantification of the electron density donation from the carbon to the metal center, from both σ and π symmetry orbitals, predicts a "nucleophilic carbene" behavior. Addition of benzophenone on complex 2 results in the formation of the expected alkene derivative and the trapping of a rare, μ(3)-oxo-Sc species via a "scandia-Wittig" reaction.
authors.affiliation: Laboratoire Hétéroéléments et Coordination, UMR CNRS 7653 (DCPH), Département de Chimie, Ecole Polytechnique, 91128 Palaiseau Cedex, France.
authors.forename: Marie
authors.initials: M
authors.lastname: Fustier
authors.forename: Xavier F
authors.initials: XF
authors.lastname: Le Goff
authors.forename: Pascal
authors.initials: P
authors.lastname: Le Floch
authors.forename: Nicolas
authors.initials: N
authors.lastname: Mézailles