title: Carbon-carbon bond formation involving reactions of alkynes with group 9 metals (Ir, Rh, Co): preparation of conjugated olefins.
abstract: Stable alkynyl complexes of iridium(III) (L(n)Ir-triple bond-R) that are prepared from the reactions of terminal alkynes readily undergo the intramolecular C-C bond-forming reactions between the alkynyl and adjacent hydrocarbyl ligands to yield conjugated olefins. These reactions are initiated by electrophiles (H(+), Me(+)) that attack the beta carbon of the alkynyl ligand to increase the electrophilicity of the alpha carbon of the alkynyl ligand. The C-C bond is then formed between the alpha carbons of the alkynyl and adjacent hydrocarbyl ligands.
authors.affiliation: Department of Chemistry, Sogang University, Seoul 121-742, Korea.
authors.forename: Chong Shik
authors.initials: CS
authors.lastname: Chin
authors.forename: Gyongshik
authors.initials: G
authors.lastname: Won
authors.forename: Daesung
authors.initials: D
authors.lastname: Chong
authors.forename: Mieock
authors.initials: M
authors.lastname: Kim
authors.forename: Hyungeui
authors.initials: H
authors.lastname: Lee