Chemistry Weekly Seminar - Hridaynath Bhattacharjee
PhD student Hridaynath Bhattacharjee will present a seminar on his PhD research.
Title: Boron-Bridged Ferrocenophanes: Strained Monomers for Metallopolymers
Synthetic polymers containing metals in the main chain can impose a diverse range of different new and valuable properties. Organometallic polymers containing three-coordinate boron have the potential for intriguing electronic and optical properties associated with the electron deficient nature of the boron centers. Boron-containing conjugated polymers can potentially be obtained via ring-opening polymerization (ROP) of strained boron-bridged [n]ferrocenophanes ([n]FCPs). After the first three boron-bridged [1]FCPs (1) were reported almost two decades ago, their chemistry came to a standstill. Recently, we resumed this chemistry by developing flexible approaches to synthesize new boron-bridged [1]FCPs (2) as starting materials for ROPs. The electronic stabilization from the nitrogen atom in so far reported boron-bridged [1]FCPs led us to our recent discovery of the first examples of azabora[2]ferrocenophanes (3). Very recently, we obtained NMR evidence of formation of the first examples of [1]FCPs with sterically stabilized boron in the bridging position (4).
In this presentation, our in-depth understanding of the mechanism of the salt-metathesis reactions and syntheses and reactivity of our boron-bridged [n]FCPs (2, 3, and 4) will be discussed.