The Didehydrobromination of 1,2-dibromo-1,2-diphenylethane is an appropriate experiment for the Alkyne chapter that is typically covered during the first semester of Sophomore Organic Chemistry.
It is a classic synthesis lab with a recrystallizable product.
2007 Student Handout:_Didehydrobromination
2007 Student_Comments:_Dehydrobromination
The GC-FID analysis of student products brought to light that an appreciable amount of starting material is present in many student samples as well as some interesting impurities and/or side products.
You can make the 1,2-dibromo-1,2-diphenyl starting material with the bromination of styrene.
The Addition of Bromine to 1,2-Diphenylethene
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