title: Heterobimetallic dibenzoindenyl (Cr(CO)3-Re(CO)3) complexes via chromium-templated [3 + 2 + 1]benzannulation: synthesis and molecular structures.
abstract: Heterobimetallic (di)benzoindenyl Re-Cr complexes have been prepared by a sequence starting from (8-bromobenzo[e]-indenyl)potassium. Reaction with pentacarbonylrhenium bromide affords tricarbonylrhenium complex 2, which has been modified to rhenium-chromium carbene complex 3. Its chromium-templated [3 + 2 + 1]benzannulation afforded the anti(Cr(CO)(3)-Re(CO)(3)) dibenzoindenyl complex 4 as the major product along with the syn diastereoisomer 5. The molecular structures of all heterobimetallic complexes were established by X-ray analyses.
authors.affiliation: Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms Universität Bonn, Bonn, Germany D-53127.
authors.forename: Julien
authors.initials: J
authors.lastname: Dubarle Offner
authors.forename: Gregor
authors.initials: G
authors.lastname: Schnakenburg
authors.forename: Françoise
authors.initials: F
authors.lastname: Rose-Munch
authors.forename: Eric
authors.initials: E
authors.lastname: Rose
authors.forename: Karl Heinz
authors.initials: KH
authors.lastname: Dötz