Author (Your Name)

R. Libby, Colby College

Date of Award


Document Type

Senior Scholars Paper (Open Access)


Colby College. Chemistry Dept.


Smith, Wayne L.


Tri-n-propylborane and tricyclopropylborane have been prepared by the action of the appropriate Grignard reagent on borantrifluoride etherate. The Grignard reagents were prepared by the action of the appropriate alkylbromide on magnesium metal. The purification of the alkylboranes was effected by distillation directly from the generator flask and redistillation of the higher boiling material with the final collection of the maximum boiling fraction. Little difference was noticed in the reactions except that the reaction of cyclopropylbromide with magnesium metal required a short initiation period, whereas the n-propylbromide reaction was spontaneous. The previously planned tests for determining the relative acidity of the two compounds were not carried out due to a lack of time.


Boranes, Acids