title: Isomerization of Cyclooctadiene to Cyclooctyne with a Zinc/Zirconium Heterobimetallic Complex.
abstract: Reaction of a zinc/zirconium heterobimetallic complex with 1,5-cyclooctadiene (1,5-COD) results in slow isomerization to 1,3-cyclooctadiene (1,3-COD), along with the formation of a new complex that includes a cyclooctyne ligand bridging two metal centers. While analogous magnesium/zirconium and aluminum/zirconium heterobimetallic complexes are competent for the catalytic isomerization of 1,5-COD to 1,3-COD, only in the case of the zinc species is the cyclooctyne adduct observed.
authors.affiliation: Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Butler
authors.affiliation: Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
authors.forename: Andrew J P
authors.initials: AJ
authors.lastname: White
authors.affiliation: Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK. m.crimmin@imperial.ac.uk.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Crimmin
keywords: cyclooctynes; diene isomerization; heterobimetallic complexes; hydrides; zirconium