What is the expected major product arising from the reaction of:?

Question

2,3-dimethyl-1-butene with bromine in carbon tetrachloride?

Answer 1

This is the bromine test for unsaturation...Br2 adds across the double bond to give 1,2-dibromo-2,3-dimethylbutane (notice the 'a')

CH3CH(CH3)C(CH3)=CH2 +Br2 ---> CH3CH(CH3)C(CH3)BrCH2Br

Answer 2

1-bromo-2,3-dimethylbutane will be the major product.

by-product will be 2-bromo-2,3-dimethylbutane.