title: Synthesis and Properties of "Sandwich" Diimine-Coinage Metal Ethylene Complexes.
abstract: Synthesis and full characterization of cationic isostructural "sandwich" diimine-coinage metal ethylene complexes are reported. Ethylene self-exchange kinetics proceeds by an associative exchange mechanism for Cu and Au complexes. The fastest ligand exchange was observed for Ag complex8a. The upper limit of ΔG‡, assuming associative ligand exchange, was found to be ca. 5.0 kcal/mol. Ethylene self-exchange in Cu complex7bproceeds with ΔG298‡= 12.9 ± 0.1 kcal/mol, while the exchange is the slowest in Au complex9, with ΔG298‡= 16.7 ± 0.1 kcal/mol. Copper complex7bis unusually stable and can survive in air for years.
authors.affiliation: Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States.
authors.forename: Kristine
authors.initials: K
authors.lastname: Klimovica
authors.affiliation: Department of Chemistry, University of Toledo, Toledo, Ohio 43606, United States.
authors.forename: Kristin
authors.initials: K
authors.lastname: Kirschbaum
authors.affiliation: Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States.
authors.forename: Olafs
authors.initials: O
authors.lastname: Daugulis