title: Unprecedented alkene complex of zinc(II): structures and bonding of divinylzinc complexes.
abstract: This report describes the solid-state structures of a series of divinylzinc complexes, one of which represents the only structurally characterized zinc(II) pi-complex. Vinylzinc reagents, Zn[C(Me)=CH2]2 (1) and Zn[C(H)=CMe2]2 (2), have been synthesized and isolated as white crystalline solids in 66 and 72% yield, respectively. Each compound exhibits an infinite polymeric architecture in the solid state via a series of zinc-pi (1) and zinc-sigma-bonded (2) bridging interactions. Addition of chelating ligands to these divinylzinc compounds allowed isolation of the monomeric adducts (bipy)Zn[C(Me)=CH2]2 (1.bipy), (tmeda)Zn[C(Me)=CH2]2 (1*tmeda), (bipy)Zn[C(H)=CMe2]2 (2*bipy), and (tmeda)Zn[C(H)=CMe2]2 (2*tmeda), of which 1*bipy, 2*bipy, and 2*tmeda have been characterized crystallographically.
authors.affiliation: P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, USA.
authors.forename: Alfred
authors.initials: A
authors.lastname: Wooten
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Carroll
authors.forename: Aaron G
authors.initials: AG
authors.lastname: Maestri
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Walsh
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D002413:Cations, Divalent; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D009942:Organometallic Compounds / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D014753:Vinyl Compounds / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
chemical_list: D000475:Alkenes; D002413:Cations, Divalent; D009942:Organometallic Compounds; D014753:Vinyl Compounds; D015032:Zinc