Binuclear Complexes Supported by Multidentate Ligands Bearing a Delocalized, Redox Non-Innocent mu-eta(3):eta(3)-(cis-Butadienoid) Core: Synthesis, Characterization and Catalysis
DescriptionCooperativity between a metal and a supporting ligand, and between multiple metal centers,can engender new reactivity that would otherwise not occur. A cooperating ligand and theassociated metal center play active, synergistic roles in reversible transformations and usefulbond activation reactions. A distinguishing attribute of cooperating ligands is their redox noninnocentnature, which can support and stabilize diverse oxidation states, as well as enhancereactivity by altering electrophilicity at the metal center. In bimetallic cooperativity, the metalcenters must be in proximity so that complementary reactivity can transpire to give superioractivity and selectivity. This project intends to develop a new class of binuclear complexessupported by multidentate ligands that feature an unusual delocalized C4-bridging moiety,which are formed by facile dimerization processes. The inverse sandwich-type M-C4-Mstructure is intriguing because variable coordination modes are evident from crystal structures,the metal ions are sufficiently close so that cooperative effects become feasible, and thedelocalized C4 moiety is potentially redox non-innocent. It is envisaged that insight into thenon-classical nature of the organometallic bonding and its mechanism of formation can begained through analytical and spectroscopic investigations. The principal objectives are todevelop novel catalyst systems with desirable characteristics, and examine the impact of thepotential cooperative effects upon reactivity.
|Effective start/end date||1/01/15 → 24/06/19|