Water-promoted,safe and scalable preparation of ammonia borane |
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| Authors: | P. Veeraraghavan Ramachandran Ameya S. Kulkarni |
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| Affiliation: | Herbert C. Brown Center for Borane Research, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907-2084, USA |
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| Abstract: | Ammonia borane (AB) has been synthesized in very high purity (>99%) from sodium borohydride and ammonium sulfate under ambient conditions in tetrahydrofuran (THF) at 1 M concentration using water as the promoter. Less than quantitative yields of AB are obtained due to a competing hydrolysis of the primary metathesis product ammonium borohydride. The solvent THF can be substituted with a greener alternative, 2-methylTHF, with no loss in yield or purity and complete recyclability. |
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| Keywords: | Ammonia borane Hydrogen storage Green synthesis Safe Scalable |
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