Making complex boron chemistry in simple reaction conditions
(2022) MH2022 — Location: Perth, Australia (2022.October.30AD)
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- Abstract
- In this talk I will cover two subjects: one on chemistry of aluminum-based amidoboranes, the other – on synthesis of higher boranes starting from metal borohydrides and borane complexes. These topics illustrate the rich chemistry of boron compounds, of interest as hydrogen stores or as solid-state electrolytes, accessible in simple mechanochemical or autoclave conditions. Synthesis of substituted amidoborane derivatives of inspired by our earlier work on Na[Al(NH2BH3)4]. We introduced various substituents on the N-side of ammonia borane, characterized their structure, stability and H-storage properties, including reactive hydride composites. Interestingly, RNH2BH3 have lower cost than pristine NH3BH3 and often are more reactive with respect to alanates. The other subject is devoted to the reaction of MBH4 (M = Li, Na, K) with BH3 complexes in autoclave conditions; later the optimization was done at ambient pressure using Schlenk line and high-boiling solvents. 11B NMR allowed us to detect a number of high borane intermediates, some of them can be isolated. The reaction ends up with dodecaboranes, M2B12H12, which we were able to obtain in high yield, high purity and at low cost.
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Citations
Zhang, T., Wang, J., Steenhaut, T., & Filinchuk, Y. (2022). Making complex boron chemistry in simple reaction conditions. MH2022, Perth, Australia. https://hdl.handle.net/2078.5/249028