TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method includes providing the amine borane in a solvent prior to the reacting step. The reacting stop involves providing the ammonia as a gas and bubbling the ammonia gas through the solution so that ammonia borane is produced; separating the ammonia borane from other reactant products and the solvent after the reacting step; and reacting the other reactant products in the solvent to produce an amine borane and reacting the amine borane produced from the other reactant products with ammonia to form ammonia borane. The synthesizing method may involve reacting dimethylaniline with ammonia gas so that ammonia borane is produced. It may include providing the dimethylaniline in a solvent prior to the step of reacting dimethylaniline, in which the ratio of the solvent to the dimethylaniline is 1:1. Preferred Component: The amine borane is diethylaniline borane, phenylmorpholine borane, lutidine borane, or preferably dimethylaniline borane. The solvent is toluene, heptane, and/or xylenes. Preferred Composition: The step of reacting the amine borane provides a yield of ammonia borane that is greater than 85 (preferably greater than 95)%. EXAMPLE - A sample (30 ml) of dimethylaniline (excess 12%) was added dropwise to dimethyl sulfide borane (20 ml) stirring at room temperature. The solution was heated to 40degreesC to evaporate dimethyl sulfide to generate a dimethylaniline borane solution. Then 30 ml toluene (30 ml) was mixed with the above solution and ammonia was bubbled through the mixture until all borane was converted to ammonia borane. The reaction was monitored. The dimethylaniline and toluene was removed by filtering the white solid ammonia borane, which was washed three times by toluene. The product was dried under vacuum with a yield of 90%. The above filtrate solution was added dropwise to dimethyl sulfide borane (20 ml) under stirring at room temperature. And then the above operation was repeated to produce ammonia borane with a yield 99%.