期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 2022, 期 28, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202200311
关键词
Ammonia-borane; Bisborane; Dehydrogenation; Diglyme; Polyaminoborane
资金
- CSIR-India
- SERB-DST, Govt. of India
The collaboration between a boron catalyst and an ethereal solvent enables the dehydrogenation of ammonia-borane, according to theoretical studies.
Metal free catalysis has emerged as a viable alternative for transition metal based catalysts for enabling different chemical processes, particularly for de/hydrogenation reactions. Herein, employing theoretical studies we reveal the unexpected Frustrated Lewis Pair like reactivity of a boron based catalyst, 9,10-dichlorodiboraanthracene and the ethereal solvent to enable dehydrogenation of ammonia-borane (NH3BH3, AB) under moderate conditions. The mechanistic channels thus uncovered reveal that the boron catalyst abstracts a hydride from NH3BH3 followed by crucial stabilization of the NH3BH2+ moiety by the nucleophilic action of the solvent. H-2 is released by the combination of hydride and proton from the borohydride moiety and the solvated NH3BH2+ respectively. Catalysis becomes unfeasible if the Lewis base-like action of the ethereal solvent is not taken into consideration. Thus, it is suggested that the clandestine partnership of the Lewis Acid, Boron catalyst and the Lewis Base, ethereal solvent, i. e. FLP like action enables dehydrogenation of NH3BH3 in the instant case.
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