Projects per year
A detailed study of H3B·NMeH2 dehydropolymerization using the cationic pre-catalyst [Rh(DPEphos)(H2BNMe3(CH2)2tBu)]-[BArF4], identifies the resting state as dimeric [Rh(DPEphos)H2]2 and boronium [H2B(NMeH2)2]+ as the chain-control agent. [Rh(DPEphos)H2]2 can be generated in situ from Rh(DPEphos)(benzyl), and catalyzes polyaminoborane formation (H2BNMeH)n [Mn = 15000 g mol–1]. Closely-related Rh(Xantphos)(benzyl) operates at 0.1 mol%, to give higher molecular weight polymer [Mn = 85000 g mol–1] on gram scale with low residual [Rh], 81 ppm. This insight offers a mechanistic template for dehydropolymerization.
Bibliographical note© 2020 American Chemical Society
- 1 Finished
Putting Low Coordination into Practice by the Exploration of Metal-sigma-Interactions: Fundamentals, New Catalysts and Catalysis for New Materials
1/01/20 → 31/03/22
Project: Research project (funded) › Research