text: Many analogues have been prepared from primary, secondary, and even tertiary amines:
  * Borane tert-butylamine ()
  * Borane trimethylamine ()
  * Borane isopropylamine ()
  The first amine adduct of borane was derived from trimethylamine. Borane tert-butylamine complex is prepared by the reaction of sodium borohydride with t-butylammonium chloride. Generally adduct are more robust with more basic amines. Variations are also possible for the boron component, although primary and secondary boranes are less common.