title: [2 + 2] cross coupling of benzene and tropylium ligands in reductively activated piano stool complexes of Mn, Cr, and W.
abstract: We have established cation/anion coupling reactions between the tropylium ligand in [M(eta7-C7H7)(CO)3]+ (M = Cr, W) and the reductively activated eta4-benzene ligand in [Mn(eta4-C6H6)(CO)3]- (3-) to form [M(CO)3(mu2-eta6:eta5-C7H7-C6H6)Mn(CO)3]; [Cr(CO)3(mu2-eta6:eta5-C7H7-C6H6)Mn(CO)3] can be further reduced to [Cr(CO)3(mu2-eta5:eta4-C7H7-C6H6)Mn(CO)3]2-, in which the tropylium and benzene ligands have undergone a [2 + 2] cross coupling reaction.
authors.affiliation: Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
authors.forename: Li
authors.initials: L
authors.lastname: Shao
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Geib
authors.forename: Paul D
authors.initials: PD
authors.lastname: Badger
authors.forename: N John
authors.initials: NJ
authors.lastname: Cooper