Amine–Borane Dehydropolymerization Using Rh-Based Precatalysts: Resting State, Chain Control, and Efficient Polymer Synthesis
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https://figshare.com/articles/dataset/Amine_Borane_Dehydropolymerization_Using_Rh-Based_Precatalysts_Resting_State_Chain_Control_and_Efficient_Polymer_Synthesis/12559064
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资源简介：
A detailed
study of H3B·NMeH2 dehydropolymerization
using the cationic precatalyst [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 = 15 000 g mol–1]. Closely related Rh(Xantphos)(benzyl)
operates at 0.1 mol % to give a higher molecular weight polymer [Mn = 85 000 g mol–1] on the gram scale with low residual [Rh], 81 ppm.
This insight offers a mechanistic template for dehydropolymerization.
创建时间：
2020-06-17
