Journal of Industrial and Engineering Chemistry, Vol.70, 472-483, February, 2019
Molecular modeling and experimental insights for the dehydrogenation of ethylene diamine bisborane using hydrogen sulfate based ionic liquid
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Dehydrogenation of ethylene diamine bisborane (EDAB) is carried out in 1-ethyl-3-methylimidazolium hydrogen sulfate ([EMIM][HSO4]) and 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM][HSO4]) ionic liquids (ILs) at 40 - 100 °C and 4 x 10-2 mbar gauge pressure. Within 30 min, 3.90 and 3.92 cumulative equivalent hydrogen generation are measured in EDAB/[EMIM][HSO4] and EDAB/[BMIM] [HSO4] respectively at 100 °C. NMR characterization elucidates the intermediate and product formation during dehydrogenation along with the structural integrity of ILs. The EDAB/[EMIM][HSO4] complex is proved to be more stable with an overall interaction energy of -471.29 KJ mol-1 when compared to EDAB/ [BMIM][HSO4]. Hydrogen bond interactions are further calculated by natural bond orbital analysis.
Keywords:Ethylene diamine bisborane;Hydrogen sulfate ionic liquid;Boron NMR;Interaction energy;Natural bond orbital
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