Document Type

Thesis

Date of Award

5-31-1989

Degree Name

Master of Science in Chemistry - (M.S.)

Department

Chemical Engineering, Chemistry and Environmental Science

First Advisor

Arthur Greenberg

Second Advisor

Barbara B. Kebbekus

Third Advisor

Guanli Wu

Abstract

Trans-Cyclooctene is thought to be more reactive than cis-cyclooctene due to its trans-structure. When cis or trans-clooctene reacts with difluormethylene (:CF2), trans-9,9-difluorobicyclo[ 6,1,0] nonane was generated in much higher yield than cis-9,9-difluorobicyclo[6,1,0]nonane. [PhCF3P+CF2Br]Br- was chosen to be the difluoromethylene precursor in this study. The reason was that the reaction condition for trans-cyclooctene and :CF2 should be at low temperature. Only [PhCF3P+CF2Br]Br- could generate CF2 at lower temperature (e.g. room temperature). We succeeded in the synthesis of trans-9,9-difluorobicyclo[6,1,0]nonane and its cis isomer and have demonstrated a principle of CF2 reactivity.

Included in

Chemistry Commons

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