Date of Award

Spring 1966

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)

Department

Chemistry

First Advisor

Haworth, Daniel T.

Second Advisor

Kittsley, Scott L.

Abstract

From the time Stock and Pohland (44) first prepared borazine in 1926 until Schaeffer and Anderson (33) found a convenient method of preparing borazine in 1949, comparatively little work was done with this compound. Since 1949 work with borazine has progressed geometrically. Today there are a large number of borazines known (15, 36). However, fluorine substituted borazines were unknown until 1962 (29) and to this day very little work has been done with fluorine substituted borazines (2, 27, 30). Also, only a few unsymmetrical borazines have been prepared (38, 40, 41, 42). It would be desirable to have a convenient method of preparing a variety of unsymmetrical borazines. By analyzing the N.M.R. spectra of a number of unsymmetrically substituted borazines, one might be able to determine which of the many forces present in the borazine molecules is the dominating force. One might also be able to determine which groups add to or detract from the aromaticity of borazine thus gaining insight into the actual structure and important forces present in borazine molecules. K. Niedenzu has reported the preparation of B-trifluoroborazine by the reaction of B-trichloroborazine with AgF, TiF4, and SbF 3. Dr. Niedenzu also has reported the preparation of mixed B-fluoro-chloroborazines although stating that careful temperature control is an absolute necessity to obtain reasonable yields (2). It was thought by the author that mixed chloro-fluoroborazines could conveniently be prepared by the reaction of B-triehloroborazines with antimony trifluoride U.sing toluene as the solvent. Tbe author also felt that mixed chloro-fluoroborazines would be good unsymmetrically substituted borazines to use for proton N.M.R. studies.

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