title: Mononuclear and terminal zirconium and hafnium methylidenes.
abstract: The dimethyl aryloxide complexes [(PNP)M(CH3)2(OAr)] (M=Zr or Hf; PNP(-)=N[2-P(CHMe2)2-4-methylphenyl]2); Ar=2,6-iPr2C6H3), which were readily prepared from [(PNP)M(CH3)3] by alcoholysis with HOAr, undergo photolytically induced α-hydrogen abstraction to cleanly produce complexes [(PNP)M=CH2(OAr)] with terminal methylidene ligands. These unique systems have been fully characterized, including the determination of a solid-state structure in the case of M=Zr.
authors.affiliation: Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA 19104 (USA) http://mindiolagroup.chem.upenn.edu/
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kamitani
authors.forename: Balazs
authors.initials: B
authors.lastname: Pinter
authors.forename: Chun-Hsing
authors.initials: CH
authors.lastname: Chen
authors.forename: Maren
authors.initials: M
authors.lastname: Pink
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Mindiola
keywords: carbenes; hafnium; hydrogen abstraction; methylidenes; zirconium